Welcome to the cheats for Knockout Kings 2000 for the Nintendo 64. Below are the cheats.
Big head mode
Pause the game and press C-Left, C-Right, C-Left(2), C-Right. If you entered the code correctly, you will hear the bell ring five times. Repeat the code to disable. -From: drm6181@earthlink.net
Big gloves mode
Pause the game and press C-Up, C-Down, C-Up(2), C-Down. If you entered the code correctly, you will hear the bell ring five times. Repeat the code to disable. -From: krugdogusa@hotmail.com
Hints
Press A + B + R and the direction to punch while the glove in the upper corner is flashing.