In the first Fatal Fury game, The King of Fighters XIII, and The King of Fighters '95, Billy sports black shoes, with blue jeans tied with a small blue jacket and gloves.
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Ever since KOF XIIs release, The King of Fighters XIII default outfit of Kensu was left unchanged, but for Athena however, her Psycho Soldier outfit was changed from default to alternate, leaving her more popular sailor fuku outfit as her default outfit for the game.