In the North American Gamecube version, there is an unused string related to displaying the game in Progressive Scan. While fully functional, Progressive Scan was not fully implemented due to the North American Gamecube version being rushed.

Progressive Scan was fully implemented in all other versions of the game.
Contributed by Takahashi2212
The North American Gamecube version features a different announcer than all other versions.
Contributed by Takahashi2212
When the game was ported to the Xbox, the intro, ending, and all character endings were changed from hand-drawn animation to 3D CG animation.
Contributed by Takahashi2212
The character Ganesha's name and beast form come from the Hindu god Ganesha.
Contributed by Takahashi2212
The character "Fang the Wolf", who appears and is playable in all other releases of the game, was included but not unlockable in the initial Gamecube release due to the game being rushed out before the method of unlocking him was actually programmed in.
Contributed by Takahashi2212
When originally released for the Gamecube, the game was called Blood Roar: Primal Fury. The name was changed to Bloody Roar: Extreme when it was released in Japan and it kept this updated name when ported to the Xbox later.
Contributed by Takahashi2212