Gaming Things We Think Are Cool!! - Games that have 'special appearances' from other game characters.

That's what this page is about.

Rules for inclusion on this page:
#1 - Only cases where the guest character is either a playable character, or an enemy, boss or interactable opponent, count. No straight-up cameos!
#2 - They must be from separate series- Ryo Sakazaki in Fatal Fury Special counts, for instance, but Hibachi in DoDonPachi Resurrection doesn't.
However, it's OK if they're in the same story continuity but originate from different series (like Street Fighter and Final Fight).
#3 - Games that are crossover games to begin with (Fighters Megamix, Super Smash Bros, etc.) don't count.
However, certain exceptional circumstances (such as Cole in Street Fighter x Tekken) will be considered.

Rules for page presentation:
#1 - English titles first, Japanese titles second.
#2 - Presented in chronological order, except when dealing with a series (i.e. Oneechabara/Aero Fighters)
We'll run through all remaining titles in that series, then go back to year order.
#3 - We'll only be listing initial/relevant release platforms and years, for space concerns.
#4 - We've divided things into 1980-1994 (previous page), 1995-1999 (this page), 2000-2009 (next page) and 2010-Present (final page).
Click the links to skip around!



X-Men: Children of the Atom
(Arcade / Saturn / PS1 / PC, 1994, Capcom)


Akuma / Gouki
from Super Street Fighter II Turbo / Super Street Fighter II X - Grand Master Challenge - Arcade, 1994, Capcom

How to Unlock/Notes:
To fight against Akuma / Gouki in 1-Player Mode, use Manual Block, win every match without continuing or losing a round, land the First Attack in every round, and end every match with your Hyper X attack- it must connect, and you must get the maximum number of hits from it at least once. If successful, Akuma / Gouki will challenge you before Juggernaut. [Source]
To play as Akuma / Gouki as Player 1, on the Character Select screen, move the cursor to Spiral and wait for three seconds. Then, press Left, Left, Left, Left, Right, Up, Right, Right, Down (you should end on Silver Samurai). Wait three seconds on Silver Samurai, then press and hold Light Kick, Heavy Punch and Heavy Kick. Akuma / Gouki will be selected for you.
To play as Akuma / Gouki as Player 2, on the Character Select screen, move the cursor to Storm and wait for three seconds. Then, press Right, Down, Left, Left, Left, Left, Down, Right, Right (you should end on Spiral). Wait three seconds on Spiral, then press and hold Light Kick, Heavy Punch and Heavy Kick. Akuma / Gouki will be selected for you. [Source]
All these codes should work in the home versions too.



Marvel Super Heroes
(Arcade / Saturn / Playstation / Xbox 360 / Playstation 3, 1995, Capcom)


Anita
from Night Warriors - Darkstalker's Revenge / Vampire Hunter - Arcade, 1995, Capcom

How to Unlock/Notes:
Japanese revisions only!
In the arcade version, have the machine set to Free Play. Hold 1P Start and the 1P Coin Switch, then quickly press Medium Punch, Light Punch, Left, Light Kick, Medium Kick [Source]
... Admittedly, I can't get this working in MAME! This is the only code I've found, though. In any case, you can use MAME cheats to play as Anita (in any region, too). If you can help us with this code, please get in touch!
In-game, Anita uses Thanos' name image, pre-fight profile pic and win image/quotes. Her attacks also summon Donavan's Dhylec sword, Akuma / Gouki, and Lei-Lei from Darkstalkers.
In the Japanese Saturn and Playstation versions, first beat the game, unlock Dr. Doom (on the Character Select screen press Up twice, holding it on the second press, then press Light Kick, Medium Kick and Heavy Kick one by one, holding each one down as you press it) and Thanos (on the Character Select screen press Down twice, holding it on the second press, then press Heavy Punch, Medium Punch and Light Punch one by one, holding each one down as you press it), then on the Character Select screen press Up, Right, Down, Lfet, Up, Right, Down, Left, then hold Up and press Light Punch, Medium Punch and Heavy Punch one by one, holding each one down as you press it. For all these codes, do not move from where you start before entering the code or it won't work! [Source]
After doing this for the first time, save your game data and Anita, alongside Dr. Doom and Thanos, will be available from the Short Cut menu.
In both versions, Anita has her own pre-battle profile picture (as seen above on the left, from the Saturn port- this art is loosely based on this piece by CRMK, used in the jacket for the drama CD Vampire Hunter Legend: Donovan, The Fated Traveller- thanks to HokutoNoShock for finding that for us) but only the Playstation version actually puts her name below her life-bar (as seen above on the right). She still has Thanos' win-screen and quotes.
In the Xbox 360 and Playstation 3 ports as part of Marvel Vs. Capcom: Origins, Anita is a character you can unlock by using 150 Vault Points, and is then selectable by pressing Back (360)/Select (PS3) on the character select screen. She even has her own moves list and hints and tips! These ports also confirm Anita was intended to be a test character. As this port is based strictly on the arcade version, she doesn't have her own pre-battle profile picture.



Galaxy Fight: Universal Warriors
(Neo-Geo / Saturn, 1995, Sunsoft)


Yacopu
from Trip World - Game Boy, 1991, Sunsoft

How to Unlock/Notes:
Yacopu is an unplayable sub-boss in the Neo-Geo MVS arcade, Neo-Geo AES home console, Neo-Geo CD and Playstation 2 versions.
In the Saturn port, highlight Vs. Mode then press and hold L, R and Y on both controllers. While holding those six button down, press Start on Controller 1. This will unlock Bonus-kun, Rouwe, Felden and Yacopu to play as (as shown on the left, screenshot from this port). [Source]
In the Playstation port, beat the 1P Mode with every character then hold down L1, R1, L2, R2, Triangle and Up and select 1P Game to unlock all the boss characters, as listed above. [Source]
When fought as a boss, Yacopu will start the first match much like he is in Trip World, with basic kicking attacks- in the second round, he will morph into his opponent. This doesn't happen when playing as him in the Saturn and Playstation ports, it's a special move instead.



Atari Karts
(Jaguar, 1995, Miracle Designs)


Bentley Bear
from Crystal Castles - Arcade, 1983, Atari

How to Unlock/Notes:
Bentley Bear is available from the start.
(Sorry for the poor screenshot- Jaguar emulation is messy!)



Space Invaders '95: The Attack of Lunar Loonies
Akkanvader
(Arcade, 1995, Taito)


Sayo & Silver Hawk
from Kiki Kaikai (Sayo) - Arcade, 1986, Taito
& Darius (Silver Hawk) - Arcade, 1986, Taito

How to Unlock/Notes:
Sayo (Player 1 side) and Silver Hawks I & II (Player 1 and 2 sides) are playable from the start.
Sayo is partnered with a new character, Miyo, who has never appeared before or since.
Silver Hawk I & II are not piloted by Proco & Tiat, but two new characters, Bonnie & Cride



Zero Divide 1 & 2
(Playstation, 1995 / 1998, ZOOM)


NECO
ZOOM's mascot, as first seen in Genocide - X68000, 1989, ZOOM

How to Unlock/Notes:
Zero Divide:
Beat the game as all eight characters to unlock XTAL, then beat the game as XTAL without using a continue. On the Character Select screen, hold L1, L2, R1 and R2 together, then press Select, then Start. [Source]
Zero Divide 2: The Secret Wish:
Beat the game once on any setting to unlock Eve and Nox, then beat the game as Eve to unlock NECO and MODOKI. [Source]
(Screenshots here come from Zero Divide 2: The Secret Wish, mostly because we're lazy and it took way less time to do it this way. If you really want to see NECO in the first, here's a Nico video, knock yourself out.)



Street Fighter Alpha: Warrior's Dreams
Street Fighter Zero

(Arcade, 1995, Capcom)


Guy and Sodom
from Final Fight - Arcade, 1989, Capcom

How to Unlock/Notes:
Guy and Sodom are available from the start.
When fighting Guy, his stage uses a remix of Slum Alleyway, the Round 1 theme from Final Fight, and so does his ending.
When fighting Sodom, his stage uses a remix that combines Trashcan Strasher and Slim Subway Smash from Final Fight, and his ending uses a remix of Tool-Grabbing, the continue screen music from Final Fight
Guy also appears as a playable character in future games in the series- Alpha 2, Alpha 3, Super Street Fighter IV, Ultra Street Fighter IV.
Sodom also appears as a playable character in future games in the series- Alpha 2, Alpha 3. Amusingly, he retains his US/EU SNES Final Fight name, Katana, in the US/EU versions of Street Fighter Alpha 2 for the SNES!



Street Fighter Alpha 2
Street Fighter Zero 2

(Arcade, 1996, Capcom)


Rolento
from Final Fight - Arcade, 1989, Capcom

How to Unlock/Notes:
Rolento is available from the start.
When fighting Rolento, his stage uses a remix of Something Putrid by the Bay, the Round 5 theme from Final Fight.
He also appears as a playable character in future games in the series- Alpha 3, Ultra Street Fighter IV.



Street Fighter Alpha 3
Street Fighter Zero 3

(Arcade / Game Boy Advance / PSP, 1998, Capcom/)


Cody
from Final Fight - Arcade, 1989, Capcom

How to Unlock/Notes:
Cody is available from the start.
He also appears as a playable character in future games in the series- Super Street Fighter IV, Ultra Street Fighter IV.


Maki
from Final Fight 2 - SNES, 1993, Capcom

How to Unlock/Notes:
Portable (Game Boy Advance & PSP) versions only!
In the Game Boy Advance version- where the screenshots above are taken- beat Arcade Mode on Difficulty Level 2 (JP) or 4 (US/EU) 7 times with 7 different characters to unlock her or, on the title screen, press Left, Right, Down, Right, L, L, A, L, L, B, R, A and Up which unlocks all other characters, [Source]
In the Playstation Portable version, Maki is available from the start.
She is based on the version of Maki that appeared in Capcom Vs. SNK 2.


Ingrid
from Capcom Fighting Evolution / Capcom Fighting Jam - Arcade, 2004, Capcom

How to Unlock/Notes:
PSP version only!
Ingrid is available from the start.
We ummed and ahhed about including Ingrid here, but we figured she wasn't really a Street Fighter character- first scheduled to appear in the crossover game Capcom Fighting All-StarsL Code-Holder, then dumped nto Capcom Fighting Evolution / Jam after All-Stars was cancelled- so she's technically an orphaned guest character, having no real game to call her own.



Waku Waku 7
(Neo-Geo / Saturn, 1996, Sunsoft)


Bonus-kun
from Galaxy Fight: Universal Warriors - Neo-Geo, 1995, Sunsoft

How to Unlock/Notes:
Bonus-kun is an unplayable sub-boss in the Neo-Geo MVS arcade and Playstation 2 versions.
In the Neo-Geo AES home console and Saturn ports, having a second player enter the game will add both Bonus-kun and the final boss Fernandez (Fernandeath in Japan) to the character select screen.



Puzzle Bobble 3
(Arcade, 1996, Taito)


Sonic Blast Man
from Sonic Blast Man - Arcade, 1990, Taito

How to Unlock/Notes:
Sonic Blast Man is available from the start.
Certain home ports (and Bust-a-Move/Puzzle Bobble Millennium) call him SSB instead.



Alpine Racer 2
(Arcade, 1996, Namco)


Dr. Don & Dr. Dan
from Point Blank / GunBullet - Arcade, 1994, Namco

How to Unlock/Notes:
When you insert a coin, hold either Left or Right before pressing Start. On the Character Select screen, press Left twice then press Start. [Source]
It's tough to see, but the text on the bottom of their skis read 'SUPER OYAJI DON & DAN' and the one facing the screen changes every time you have a bad crash and tumble over.



Rival Schools - United by Fate
Shiritsu Justice Gakuen - Legion of Heroes

(Arcade / Playstation, 1996, Capcom)


Sakura Kasugano
from Street Fighter Alpha 2 - Arcade, 1995, Capcom

How to Unlock/Notes:
In the arcade version, either hold Start as you begin the game after the machine has been operating for four weeks and move the selection cursor up or down until it's off the grid, or enter Test Mode, go to Sound & Voice, then using Player 2's controls, press Up, Up, Down, Down, LK, HP. This unlocks Hyo and Raizo. Next, in Test Mode, go to Input, then using Player 2's controls, press Up, Up, Down, Down, then switch to the Player 1 controls and press LK, HP. Hold Start as you start the game, and Sakura will be selectable. [Source]
In the PS1 port, Sakura is available from the start.



Cyberbots: Fullmetal Madness
(Playstation / Saturn, 1996, Capcom)


Zero-Akuma / Zero-Gouki
based on Akuma/Gouki from Super Street Fighter II Turbo / Super Street Fighter II X - Grand Master Challenge - Arcade, 1994, Capcom

How to Unlock/Notes:
Saturn/Playstation version only!
In the Playstation port, unlock Galts (beat the game as Chiyomaru and& Tessan), Helion (beat the game as SHADE) and Super-8 (beat the game as Devilotte) to unlock Warlock, then beat the game as Warlock without using a continue to unlock Zero-Gouki (Untested!) [Source]
In the Saturn port, either beat Arcade Mode on any difficulty from Difficulty 4 upwards without continuing, or beat Arcade Mode 99 times, to unlock Zero-Gouki. [Source]
Although technically not a guest character as such- aside from an appearance as a card in Cardfighter's Clash he hasn't appeared in any other games- he's very obviously supposed to be Akuma/Gouki and even plays like him (dude, Raging Demon's totally in this game) so... It counts, I guess?



Sengoku Blade: Sengoku Ace Episode II
(Saturn, 1996, Psikyo)


Marion
from Gunbird - Arcade, 1994, Psikyo

How to Unlock/Notes:
Saturn version only!
(This means Marion is not in the Playstation 2 port, as part of Psikyo Shooting Collection Vol. 2: Sengoku Ace & Sengoku Blade, either).
In the Saturn version, beat the game once on any difficulty with every character (this includes Ayin- go to the Random icon and press Up, Up, Up, Down, Down, Down, Up, Up, Up, Up, Up, Up, Up to select him). This cannot be done in two-player mode! One-player only! Once every character has a checkmark on their icon, highlight the ? on the Character Select screen and press Up to select Marion (press Up twice to select Ayin again). [Source]



Suiko Enbu - Outlaws of the Lost Dynasty / Suiko Enbu: Fuuun Saiki
(Playstation / Saturn, 1996, Data East)


Makoto Mizoguchi and Liu Yungmie
from Fighter's History (Mizoguchi) - Arcade, 1993, Data East
& Karnov's Revenge / Fighter's History Dynamite (Yungmie) - Neo-Geo, 1994, Data East

How to Unlock/Notes:
Playstation / Saturn version only!
In the Playstation version- titled Suiko Enbu - Outlaws of the Lost Dynasty and only released in Japan- on the title screen for Special Mode press Up, Down, Left, Right, Down, Up, Right, Left, L2 and R2 to unlock Mizoguchi in 2-Player Mode. [Source]
In the updated Saturn version- titled Suiko Enbu: Fuuun Saiki, also only released in Japan- Mizoguchi and Yungmie are available from the start and can be played in both Arcade and 2-Player Vs. Mode (this is where the screenshots above come from).
This is unconfirmed but it would appear Mizoguchi cannot be unlocked in the US Saturn version- titled Dark Legend- as no code can be found, and trying to put the Playstation version's code doesn't work.



Super Fire Pro Wrestling X Premium
(SNES, 1996, Human)

Daijiro Zama, Eric Starback, Baron Firebird, John Bantline Saigo, Wolf McSchnider, Ho Yin-Long, Jailbreaker Bulloni, Hayate and Hizelshustat Von Ludwig
from Blazing Tornado / Fire Pro Gaiden: Blazing Tornado - Arcade / Saturn, 1994 / 1995, Human

How to Unlock/Notes:
Clear World Championship Mode and save the game, then clear the Neo Heroic Belt in Title Match with the same wrestler you cleared World Championship with. This will unlock all these characters.
Please note these screenshots come from an earlier fan translation of the game, so they are using slightly different names- the ones shown in text on this page are the correct names.
(Screenshots and information provided by Jake- thanks!)



Dead or Alive
(Arcade / Playstation / Saturn / Xbox, 1996, Team NINJA/Tecmo)


Ryu Hayabusa
from Ninja Gaiden / Ninja Ryukenden - Arcade, 1988, Tecmo

How to Unlock/Notes:
Ryu is available from the start.
He also appears as a playable character in... Er... Pretty much every other Dead or Alive game outside the spin-offs. I'm not listing them all.



Dead or Alive 4
(Xbox 360, 2005, Team NINJA / Tecmo)


SPARTAN-458
based on the Spartans from Halo: Combat Evolved - Xbox / PC, 2001, Bungie

How to Unlock/Notes:
Complete the Story Mode with all 16 characters to unlcok Helena, then complete Story Mode with Helena. This will also unlock her stage, Nassau Station.
Additionally, if SPARTAN-458 is present on the Gambler's Paradise stage with Danger Zones switched on, a new vehicle will be added to the set that can run you over- a Warthog, also from the Halo series. [Source]
Also known as Nicole, SPARTAN-458 is not based on any particular Spartan from the Halo series, but while her appearance in Dead or Alive 4 is not considered canon, she is canon in the Halo universe!
As she could not appear in future Dead or Alive games, Rachel's fighting style (as she appears in Dead or Alive 5 Ultimate) is loosely based on the one used by SPARTAN-458. [Source]



Dead or Alive Paradise
(PSP, 2010, Team NINJA / Tecmo)


Rio Rollins Tachibana
from Super Black Jack - Arcade, 2003, Tecmo

How to Unlock/Notes:
Receive the Zack's Challenge item in the hotel, then go to the Casino, challenge Rio to Blackjack, and win with 1 Blackjack. [Source] [Screen Source]
Initially appearing in Super Black Jack, Rio would later star in her own pachislot machines (simulations of which were ported to the Playstation 2 as Rakushou! Pachi-Slot Sengen 5: Rio Paradise and Rakushou! Pachi-Slot Sengen 6: Rio 2 Cruising Vanadis [Source].
She would also get a starring role in her own anime, Rio: Rainbow Gate! [Source]



Dead or Alive 5
(Playstation 3 / Xbox 360 / Playstation Vita, 2012, Team NINJA)


Akira Yuki, Sarah Bryant & Pai Chan
from Virtua Fighter - Arcade, 1993, Sega AM2

How to Unlock/Notes:
To unlock Akira, defeat him in Chapter 15 - 10 Years in Story Mode. Alternatively, in the patched version, fight 25 online ranked matches.
To unlock Sarah, deafeat her in Chapter 20 - A Rival Appears in Story Mode. Alternatively, in the patched version, fight 75 online ranked matches.
To unlock Pai Chan, unlock 100 titles. Alternatively, in the patched version, fight 150 online ranked matches.[Source] [Screen 1 Source] [Screen 2 Source] [Screen 3 Source]



Dead or Alive 5 Ultimate
(Playstation 3 / Xbox 360 / Arcade, 2013, Team NINJA)



Jacky Bryant, Momiji and Rachel
from Virtua Fighter (Jacky) - Arcade, 1993, Sega AM2
Ninja Gaiden: Dragon Sword (Momiji) - Nintendo DS, 2008, Team Ninja/Tecmo
& Ninja Gaiden (Rachel) - Xbox, 2004, Team Ninja/Tecmo

How to Unlock/Notes:
Jacky (and the other Virtua Fighter characters), Momiji and Rachel are available from the start. [Screen Source]



Dead or Alive 5 Last Round
(Windows / Playstation 3 / Playstation 4 / Xbox 360 / Xbox One / Arcade, 2015, Team NINJA)



Naotora Ii & Mai Shiranui
from Samurai Warriors Chronicles - Nintendo 3DS, 2011, Omega Force
& Fatal Fury 2 / Garou Densetsu 2 - Neo-Geo, 1992, SNK


How to Unlock/Notes:
Naotora Ii was added in a March 2016 update to the game as a DLC character.[Screen Source]
Mai was added in a September 2016 update to the game as a DLC character, alongside a pack of costumes based on Hinako Shijo (for Marie-Rose and Honoka), Yuri Sakazaki (for Ayane and Hitomi) and Kasumi Todoh (for Kasumi and Momiji).[Screen Source]



The King of Fighters '95
Nettou The King of Fighters '95

(Game Boy, 1996, Galbrain / Takara / SNK)


Nakoruru
from Samurai Shodown / Samurai Spirits - Neo-Geo, 1993, SNK

How to Unlock/Notes:
Finish the game on Hard difficulty to fight Nakoruru after the credits.
To play as Nakoruru, press the Select button 20 times (!) on the Takara logo after switching the game on. [Source]



Battle Arena Toshinden
(PC, 1996, Digital Dialect / Tamsoft)


Earthworm Jim
from Earthworm Jim - Mega Drive, 1994, Shiny Entertainment
How to Unlock/Notes:
PC version only!
On the title screen, type gimmejim. He can be selected by moving the selection cursor left from Eiji.[Source]
He carries a club and has the exact same moves as Rungo Iron, but his stage has the Andy Asteroids? theme from his own game, and he also has his own voice clips. He was included in this version as it was published by Playmates, who also published the Earthworm Jim games in the US.



Raiden Fighters
(Arcade, 1996, Seibu Kaihatsu)


Judge Spear
from Viper Phase 1 - Arcade, 1995, Seibu Kaihatsu

How to Unlock/Notes:
Judge Spear is available from the start.
The ship also appears as a selectable ship in future games in the series- Raiden Fighters 2: Operation Hell Dive (as a secret ship, explained below), Raiden Fighters Jet.



Raiden Fighters 2: Operation Hell Dive
(Arcade, 1997, Seibu Kaihatsu)


Miclus and Judge Spear
from Wiz - Arcade, 1985, Seibu Kaihatsu
& Viper Phase 1 - Arcade, 1995, Seibu Kaihatsu

How to Unlock/Notes:
On the Figher Select screen, hold Fire and press Start, then as you highlight the '?' icon, hold the joystick diagonally down-right and press Fire to select Miclus, or just down and press Fire to select Judge Spear.[Source]
Alternatively, Judge Spear will appear on the Fighter Select screen as a standard fighter after the cabinet's seventh week of operation from its last internal clock reset, and Miclus will follow suit after the cabinet's eleventh week of operation. [Source]
Miclus also appears as a standard character in Raiden Fighters Jet.
While most closely associated with the Raiden series as a bonus item, Miclus originally appeared as the Helper summon in Wiz, as well as the final boss (thanks, Raiden Wiki!).



Saturn Bomberman
(Saturn, 1996, Hudson Soft)


Milon, Master Higgins, Bonk, Manjimaru, Kabuki, Kinu, Manto & Yuna
from Milon's Secret Castle / Meikyū Kumikyoku: Milon no Daibōken (Milon) - NES, 1986, Hudson Soft
Adventure Island / Takahashi Meijin no Bōken Jima (Master Higgins) - NES, 1986, Hudson Soft
Bonk's Adventure / PC Genjin (Bonk) - TurboGrafx-16, 1989, Red Entertainment/Hudson Soft
Tengai Makyō II: Manjimaru (Manjimaru, Kabuki & Kinu) - TurboGrafx Super-CD, 1992, Red Entertainment/Hudson Soft
Tengai Makyō: Ziria (Manto) - TurboGrafx CD, 1989, Red Entertainment/Hudson Soft
& Galaxy Fraulein Yuna (Yuna) - TurboGrafx CD, 1992, Red Entertainment/Hudson Soft

How to Unlock/Notes:
Bonk, Master Higgins, Milon, Manjimaru, Kabuki and Kinu are availablefrom the start, selectable for Battle Mode matches.
Yuna and Manto need to be unlocked by holding down L and R on the Battle Mode menu screen until you hear a chime. Yuna starts each match with high speed, while Manto starts each match with a Power Glove. [Source]

Thanks to The Bomberman Wiki for quick reference for the Tengai Makyō characters!



Prikura Daisakusen
(Arcade / Saturn, 1996 / 1997, Atlus)


Jack Frost
from Digital Devil Story: Megami Tensei II - NES, 1990, Atlus

How to Unlock/Notes:
Your helper creature will evolve into Jack Frost by either hitting the Jewel quota with the Dragon Puppy helper, or hitting the Animal quota with the Tiny Devil helper.



Diddy Kong Racing
(Nintendo 64, 1997, Rareware)


Banjo & Conker
from Banjo-Kazooie (Banjo) - Nintendo 64, 1998, Rare
& Twelve Tales: Conker 64 (Conker) - Announced at E3 1997, altered to become Conker's Bad Fur Day - Nintendo 64, 2001, Rare

How to Unlock/Notes:
Banjo and Conker are available from the start.
Both these characters appeared in this game before their own games were released!
Both of them were removed from the Nintendo DS port of the game, replaced by Tiny Kong and Dixie Kong.



Flying Dragon
Hiryu no Ken Twin

(Nintendo 64, 1997 / 1998 / 1999, Culture Brain)


Robo no Hana & Bokuchin
from Super Chinese Fighter (Robo no Hana) - NES, 1995, Culture Brain
& Super Chinese 3 (Bokuchin) - NES, 1991, Culture Brain

How to Unlock/Notes:
Robo no Hana is available from the start in SD Mode only.
Either beat him in any game mode, or enter the password VITUKOB from the Treasure List Status screen to unlock Bokuchin in SD Mode only.
Both would appear in the update/sequel S.D. Hiryu no Ken Densetsu.



S.D. Hiryu no Ken Densetsu
(Nintendo 64, 1999, Culture Brain)



Jack, Ryu and Golfire
from Little Ninja Bros. / Super Chinese 2 (Jack & Ryu) - NES, 1989 / 1990 / 1991, Culture Brain
& Super Chinese Fighter (Gofire) - NES, 1995, Culture Brain

How to Unlock/Notes:
Jack, Ryu and Gofire are available from the start.



Puchi Carat
(Arcade / Playstation / Game Boy Color, 1997, Taito)


Patoraco / Patrako
from Cleopatra Fortune - Arcade, 1996, Natsume/Taito

How to Unlock/Notes:
In the arcade version, when you insert a coin, press the action button 3 times then press Start on the How to Play tutorial. Patoraco will be at the top of the character select screen. [Source] In this version, she;s called Patoraco.
In the Playstation port, either beat Story Mode in Arcade Mode in under 7 minutes using less than 5 continues with Game Level and Ball Speed set to Arcade, or enter the Options menu then exit it, and repeat 13 times (this method won't save to a Memory Card). [Source] In this version, she;s called Patrako... Most of the time.
In the Game Boy Color port, beat Story Mode with all twelve characters to unlock Patoraco.
Unlike the other characters, her paddle is carried by two mummy servants.



Heaven's Gate
(Playstation, 1997, Racdym)


Kurara Hananokoji
from Power Instinct 2 / Gouketsuji Ichizoku 2 - Arcade, 1994, Atlus

How to Unlock/Notes:
Kurara does not appear in the arcade version of the game.
In the PS1 port's Arcade Mode, highlight Nanase and press Select, Up, Down, Down, L1 + L2, Start to select Kurara. [Source]



Tobal 2
(Playstation, 1997, DreamFactory / Squaresoft)


Chocobo
from Final Fantasy II - NES, 1988, Squaresoft

How to Unlock/Notes:
Beat the Practice Dungeon. Chocobo can be selected by going through the red 'enemy' icon on the Character Select screen. [Source]



All Japan Pro Wrestling featuring Virtua
(Arcade / Saturn, 1997, Scarab / Sega)


Wolf Haekfield & Jeffry McWild
from Virtua Fighter - Arcade, 1993, Sega AM2

How to Unlock/Notes:
Wolf and Jeffrey are available from the start.
Wolf and Jeffrey also appear in the follow-up, Giant Gram: All Japan Pro Wrestling 2.



Giant Gram: All Japan Pro Wrestling 2
(Dreamcast, 1999, Scarab / Sega)


Kage-Maru
from Virtua Fighter - Arcade, 1993, Sega AM2

How to Unlock/Notes:
Alongside Wolf and Jeffrey from the previous game, Kage-Maru is available from the start.



Street Fighter III: Second Impact
(Arcade, 1997, Capcom)


Hugo
from Final Fight - Arcade, 1989, Capcom

How to Unlock/Notes:
Hugo is available from the start.
Although renamed, Hugo is supposed to be the same Andore from Final Fight. Poison appears in his pre-match intros.
Hugo also appears in Ultra Street Fighter IV.



Ultra Street Fighter IV
(Arcade / Xbox 360 / Playstation 3, 2014, Capcom/Dimps)


Poison
from Final Fight - Arcade, 1989, Capcom

How to Unlock/Notes:
Poison is available from the start.
(Screenshots provided by @Scrollboss- thanks!)



Le Mans 24
(Arcade, 1997, Sega)


Sonic the Hedgehog
from Sonic the Hedgehog - Mega Drive, 1991, Sonic Team

How to Unlock/Notes:
The code is different depending on the ID of the cab, found in the Test Mnu.
For an game ID of TWIN LEMANS CAB, highlight the Nismo R33, turn Left, hold the Start, Brake and VR Buttons 1 and 3, then press the Accelerate pedal.
For an game ID of TWIN NORMAL CAB, highlight the Nismo R33, turn Left, hold the Start and Zoom In buttons, then press the Accelerate pedal. [Source]
When you take the car to the Pit Lane, Sonic will be swapped out with a strange dog/rabbit creature- can you identify them?
(Screenshots and information provided by Liam Ashcroft- thanks!)



Armed Police BatRider
(Arcade, 1997, Raizing / Eighting)


Gain, Chitta, Miyamoto, Bornnam, B. Wayne and J. Wayne
from Sorcer Striker/Mahou Daisakusen (Gain, Chitta, Miyamoto and Bornnam) - Arcade, 1993, Raizing
& Battle Garegga (B. Wayne and J. Wanye) - Arcade, 1996, Raizing/Eighting
How to Unlock/Notes:
Insert a coin, then press Up, Up, Down, Down, Left, Right, Left, Right, Shoot, Bomb, Start- hey, it's the Konami Code! This will unlock all the guest characters plus Car-Pet (who doesn't seem to be from any other game) for use in Team Edit/Select Player modes. [Source]
Alternatively, you can enable these secret characters with the game's dip-switches.
B. Wayne and J. Wayne are actually on the character select screen twice- they have two planes to choose from.



Clayfighter 63 1/3 & Clayfighter: The Sculptor's Cut
(Nintendo 64, 1997 / 1998, Interplay)


Earthworm Jim & Boogerman
from Earthworm Jim (Earthworm Jim) - Mega Drive, 1994, Shiny Entertainment
& Boogerman - A Pick & Flick Adventure (Boogerman) - Mega Drive, 1994, Interplay

How to Unlock/Notes:
Clayfighter 63 1/3:
Earthworm Jim is available from the start.
To unlock Boogerman, on the Character Select screen hold L and press Up, Right, Down, Left, Right, Left. [Source]
Clayfighter: The Sculptor's Cut:
To unlock Earthworm Jim, highlight the ? on the Character Select screen, hold L and press C-Left, C-Down, C-Left, C-Right, B, A, then let go of L and press R.
To unlock Boogerman, highlight the ? on the Character Select screen, hold L and press B, B, C-Right, C-Right, C-Left, C-Right, then let go of L and press R. [Source]

(Screenshots here come from Clayfighter 63 1/3 because the Character Select screen shows them off better.)



Fighting Layer
(Arcade, 1998, Arika)


Allen Snider & Blair Dame
from Street Fighter EX - Arcade, 1996, Arika

How to Unlock/Notes:
Allen and Blair are available from the start.



Nettou Real Bout Garou Densetsu Special
(Game Boy, 1998, Galbrain / Takara / SNK)


Iori Yagami
from The King of Fighters '95 - Neo-Geo, 1993, SNK

How to Unlock/Notes:
Beat the game on Normal/Hard Mode to fight Iori after the credits (after fighting Geese). Afterwards, you can select Iori by pressing Start of Billy Kane's icon on the Character Select screen (and Geese by doing the same on Krauser's icon). [Source]
Alternatively, use the Soft Dip cheat- press Left and A while on the Sound Test option in the Options Menu- and change the first 0 to a 1 to unlock both Iori and Geese automatically. [Source]



Boombots
(Playstation, 1998, The Neverhood, Inc.)


Klaymen
from The Neverhood/Klaymen Klaymen - Windows, 1996, The Neverhood, Inc.

How to Unlock/Notes:
On the Character Select screen, press Square, Square, Square, Square, Circle, Circle, Circle, Circle, Square, Square, Square, Square, Select, Select and Select. [Source]
This will also unlock the Neverhood stage, based on Klaymen's game.



Blazing Star
(Neo-Geo, 1998, Yumekobo)


Kaoru Yamazaki & Dino 246
from Pulstar - Neo-Geo, 1995, Aicom

How to Unlock/Notes:
Kaoru Yamazaki is available from the start.
She pilots the Dino 246, the same ship from Pulstar.
While Blazing Star is technically a sequel to Pulstar anyway, it's easy to miss she's supposed to be from that game, and the game was developed by Yumekobo instead of Aicom, so... We're counting it?



Ehrgeiz
(Playstation, 1998, DreamFactory / Squaresoft)


Cloud Strife, Tifa Lockheart, Yuffie Kisaragi, Vincent Valentine, Sephiroth & Zack Fair
from Final Fantasy VII - Playstation, 1997, Squaresoft

How to Unlock/Notes:
In the arcade version, only Cloud and Tifa are available.
To fight Cloud & Tifa, defeat 8 CPU characters within 8 minutes 40 seconds.
They are unlocked to play as after the machine has been on for 30 days (Cloud) and 50 days (Tifa) [Source]
In the Playstation port, Cloud, Tifa and Sephiroth are unlocked from the start.
To unlock Yuffie Kisaragi, beat the game with Cloud.
To unlock Vincent Valentine, beat the game with Tifa.
To unlock Zack, beat the game with all the other Final Fantasy VII characters. [Source]



Anna Kournikova's Smash Court Tennis
Smash Court 2

(Playstation, 1998, NowProduction / Namco)


Richard Miller, Sherudo Garo, Heihachi Mishima, Yoshimitsu, Eddie Gordo, Reiko Nagase & Pac-Man
from Time Crisis (Richard & Sherudo) - Arcade, 1995, Namco
Tekken 3 (Heihachi, Yoshimitsu & Eddy) - Arcade, 1994, Namco
Ridge Racer Type 4 (Reiko) - Playstation, 1998 / 1999, Namco
& Pac-Man (Pac-Man) - Arcade, 1980, Namco

How to Unlock/Notes:
These characters are unlocked by beating specific Street Tournaments in Tournamen Mode several times:
Asaksa Temple: 6 Times (Heihachi)
Time Square: 4 Times (Eddy), 5 Times (Reiko), 6 Times (Pac-Man)
Osaka Bridge: 5 Times (Richard)
Theme Park: 5 Times (Yoshimitsu), 6 Times (Sherudo) [Source]



Hot Shots Golf 2
Everybody's Golf 2

(Playstation, 1998, Clap Hanz)


Gex, Sweet Tooth & Sir Daniel Fortesque
from Gex (Gex) - 3D0 / Playstation / Saturn / PC, 1994, Crystal Dynamics
Twisted Metal (Sweet Tooth) - Playstation, 1995, SingleTrac
& Medevil (Sir Daniel Fortesque) - Playstation, 1998, SCE Studio Cambridge

How to Unlock/Notes:
American / European versions only!
Play through the Vs. Mode to unlock more characters- these three are the last ones you will fight and unlock. [Source]
Alternatively, start a new game and enter the name 2gsh to unlock everything from the start.[Source]



Fighter Maker
3D Kakutou Tsukuru

(Playstation, 1998 / 1999, ASCII Soft)


Skullomania
from Street Fighter EX - Arcade, 1996, Arika

How to Unlock/Notes:
Japanese version only!
Skullomania is included as a default fighter to create your fighting game with.



Battle Tryst
(Arcade, 1999, Konami)


Pastel & Elaine
from Detana!! TwinBee (Pastel) - Arcade, 1991, Konami
& Gaiapolis (Elaine) - Arcade, 1993, Konami

How to Unlock/Notes:
Pastel and Elaine are unlocked through the game's time-release system. [Source]
(Screenshots scanned from Gamest #221, provided by Ragey- thanks!)



Jet Force Gemini
(Nintendo 64, 1999, Rareware)


Mr. Pants
from Rareware's old website as Mr. Pants the Survey Man

How to Encounter/Notes:
Decapitate and claim 300 Ant Heads to unlock the 'Ants as Pants' cheat mode, accessible from the pause menu. All standard blue ant enemies will be replaced with Mr. Pants. [Source]



Rakugaki Showtime
(Playstation, 1999, Treasure)


Marina Liteyears / Marina=Nugget
from Mischief Makers / Yuke Yuke!! Trouble Makers - Nitnendo 64, 1997 / 1998, Treasure

How to Unlock/Notes:
5 characters can be unlocked by beating Easy, 6 can be unlocked by beating Normal, and 2 moer are unlocked by beating Hard (the difficulty is assigned based on your performance in the first 5 stages). Marina is one of those characters.
She can also be an opponent on Stage 7 of the Normal Mode. [Source]
Alternatively, hold Left, Triangle, X, L1, R2 and Select on the title screen until you hear an explosion, then hold L2 and Select until you hear a throwing sound- this unlocks every character, including Marina. [Code Source]
Yes, she can Shake Shake in this game too.



Chocobo Racing
(Playstation, 1999, Squaresoft)


Jack
from The 3-D Battles of WorldRunner / Tobidase Daisakusen - NES / Famicom Disk System, 1987, Squaresoft

How to Unlock/Notes:
Beat the Story Mode 10 times, then hold the L2 and R2 buttons while the cursor is on Squall on the Character Select screen to select Jack. [Source]



The Grid
(Arcade, 1999, Midway)


Scorpion, Sub-Zero & Noob Saibot
from Mortal Kombat (Scorpion & Sub-Zero) - Arcade, 1992, Midway
& Mortal Kombat II (Noob Saibot) - Arcade, 1993, Midway

How to Unlock/Notes:
To play as Scorpion, reach a total of 1,000 (v1.0) or 2,400 Points (v1.2), then enter the code SCO# (726#) on the character select screen.
To play as Sub-Zero, reach a total of 3,000 (v1.0) or 4,500 Points (v1.2), then enter the code SUB# (782#) on the character select screen.
To play as Noob Saibot, beat Single Player mode once (v1.2 only), then enter the code PNS# (767#) on the character select screen. [Source]



Planet Harriers
(Arcade, 1999, Sega / Amusement Vision)


Opa-Opa
from Fantasy Zone - Arcade, 1986, Sega

How to Unlock/Notes:
On the Character Select screen, press Right, Down, Left, Up, Left, Down, Left, Up, Right, Left, Up. [Source]
Selecting Opa-Opa will also change the Star Shop's music to Shop-A from Fantasy Zone



Sen-Know
(Arcade, 1999, Kaneko)


Edward Randy
from Edward Randy: The Cliffhanger - Arcade, 1990, Data East

How to Encounter/Notes:
Select the green fellow above in Vs. Character's mode. His first opponent will be Edward Randy, who isn't normally selectable/playable. [Source]



Last Legion UX
(Nintendo 64, 1999, Yuke's / Hudson Soft)


Bomberon piloted by Black Bomberman / Kuro Bom
from Bomberman II - NES, 1991, Hudson Soft

How to Encounter/Notes:
Beat Story Mode with 5 different characters.
Alternatively, unlock everything in the game by holding the L+R buttons and rotating the control stick clockwise on the main nenu until you hear a noise.
Although Bomberon itself is not from the Bomberman series, it's clearly being piloted by Black Bomberman.
(Screenshots and information provided by Jake- thanks!)
(We would relpace the photo with an emulated screenshot, but the game did not want to play ball with our emulator, alas)



Trick'N Snowboarder
Tricky Sliders

(Playstation, 1999, CAVE)


Leon S. Kennedy, Claire Redfield & Zombie Cop
from Resident Evil 2 - Playstation, 1998, Capcom

How to Unlock/Notes:
On the title screen, press Triangle, Triangle, X, X, Square, Circle, Square, Circle. On the Character Select screen, press L2 or R2 to select these three characters. [Source]



Gunbird 2
(Arcade / Dreamcast, 1999, Psikyo / Capcom)


Aine
from Tengai / Sengoku Blade: Sengoku Ace Episode II - Arcade, 1996, Psikyo

How to Unlock/Notes:
In the arcade version, enter Test Mode, go to the Maintenance Code entry screen and enter 5-1-0-2-4. 'AINE OK' will appear. From now on, highlight the ? on the Character Select screen and press Down to select Aine.
Alternatively, entering 5-3-7-6-5 will not unlock Aine, but add him to the roulette for the ? icon on the Character Select screen. [Source]
In the Dreamcast version, Aine is selected in the same way but without any code entry required.


Morrigan
from Darkstalkers / Vampire: The Night Warriors - Arcade, 1994, Capcom

How to Unlock/Notes:
Dreamcast version only!
Morrigan appears in the Dreamcast port as it was published by Capcom in Japan and the US (Virgin Interactive in Europe).
Highlight the ? on the Character Select screen and press Up to select Morrigan. [Source]


Advance to 2000-2009!


Obviously, we can't take credit for spotting all these. So credits for powerful Twitter folk:

Idolmeister: Shots of Shikigami no Shiro III
DavZZGndm: Rondo of Swords/Deception
HokutoNoShock: Puzzle Bobble 3; shots of Elevator Action Deluxe
inobscurity:Windy x Windam, Gunbird 2
Motherplayer: Boombots
Scrollboss: Shots of Ultra Street Fighter IV
Kimimi: Shots of Lost Planet 2
Liam Ashcroft: Shots and info of Le Mans 24; shots of Virtua Striker 2003; shots of Sonic Riders
Kroogah: Shots and info of Super Meat Boy; shots and info of Spelunky
Jake: Fighter Maker, Monster Maulers, Giant Gram: All Japan Pro Wrestling 2; shots and info of Super Fire Pro Wrestling X Premium, shots and info of Last Legion UX
Ragey: Scans and info of Battle Tryst

Know any we've missed? Got screenshots for some we're missing 'em for?
Fire up your email account, type in themetalslug at gmail dot com and shout words at me to get it right!

Sigh.