Ready 2 Rumble Boxing: Round 2 (N64)

Champion costumes:

Beat the game in championship mode to unlock the champion costumes.


Fat boxer:

Press Right, Right, Up, Down, Right, R, R, L at the character selection screen.


Skinny boxer:

Press Right, Right, Up, Down, Right, R, L at the character selection screen.


Zombie boxer:

Press Left, Up, Right, Down, R, R, L at the character selection screen.


Huge gloves:

Press Left, Right, Up, Down, R, L at the character selection screen.