For most characters, this consists of fighting six characters, with Duke's cronie / Consigliere Hyena announcing the next opponent between matches.
Stephen King | King's College London | King Arthur | King | Nat King Cole | Burger King | B.B. King | The Lion King | King Lear | Martin Luther King, Jr. | King Edward VII | King Crimson | Larry King Live | King of the Hill | king | Larry King | Foo Fighters | King's College, Cambridge | King Kong | King's College | Martin Luther King | London King's Cross railway station | Carole King | King Edward's School, Birmingham | William Lyon Mackenzie King | The King and I | Martin Luther King Jr. | King's Lynn | The King of Queens | High King of Ireland |
Two of the characters from Crystalis are subtle nods to earlier SNK characters who later became part of The King of Fighters series; the latter two sages, Kensu and Asina, are based on Kensou Sie and Athena Asamiya from the Psycho Soldier arcade game.
The Shōwa Mechagodzilla appears in the video games Godzilla: Monster of Monsters for the Nintendo Entertainment System, Godzilla for the Game Boy, The American version of Super Godzilla for the Super Nintendo, Godzilla: Battle Legends for TurboDuo, Godzilla Generations for the Dreamcast and Godzilla Generations: Maximum Impact for the Dreamcast.
It is made in style of other fighting games such as Street Fighter, Art of Fighting, Darkstalkers and even The King of Fighters, of game companies like Capcom and SNK.
In addition to previous established fighting game stars Terry Bogard and Ryo Sakazaki, the game introduces a new hero: a young Japanese martial artist named Kyo Kusanagi, who serves as the lead character in the early KOF games.
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A manhua adaptation of KOF titled The King of Fighters: Zillion was created by Andy Seto.
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The producer of the Maximum Impact series, Falcoon, stated that the Maximum Impact games are in a different continuity from the original series of games.