The character Jeffry McWild was modeled after real life martial artist Willie Williams. At some point in development, Jeffry was planned to be named Willie but his name was later changed due to copyright concerns.

During early development there were going to be two playable character named Majido (later reintroduced as Siba in Fighters Megamix) and a military style character named Jeff. The code for the characters can still be found withim the game files.
An early version of protagonist Akira Yuki is available withim the game's code as well.