May is the only female enemy in the Final Fight series who neither was replaced by a male enemy in the international version of the game or has a named palette swap.
Contributed by ZpaceJ0ck0
In the European version of the game, holding Select until the Capcom logo fades away will bring up a debug menu which allows for various cheats such as health regeneration and a stage select. In the North American version of the game, this is disabled and only accessible via an Action Replay or similar device.
Contributed by ZpaceJ0ck0
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The enemy G was black in the Japanese version of the game, but his skin tone was lightened in the international version.
Contributed by ZpaceJ0ck0
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The game was released as Final Fight Tough in Japan, and had a more decorated logo.
Contributed by ProtoSnake