Press Start to pause game play in Story mode, then activate the following cheats by entering the corresponding codes: Note: Re-enter a code to disable its effect:

CHEAT FUNCTION - CHEAT CODE
Freeze any enemy Crash touches - Hold R and quickly press DOWN, DOWN, DOWN, UP.
Shadow Crash - Hold R and quickly press LEFT, RIGHT, LEFT, RIGHT.
Make various parts of Crash bigger - Hold R and quickly press LEFT, LEFT, LEFT, DOWN.
Enemies leave behind Purple Fruit power-ups - Hold R and quickly press UP, DOWN, DOWN, UP.
Enemies leave behind Show power-ups (super kick) - Hold R and quickly press UP, RIGHT, DOWN, LEFT.
Enemies leave behind Boxing Glove power-ups (quadruple damage) - Hold R and quickly press UP, UP, UP, LEFT.
Enemies leave behind Wumpa Fruit power-ups - Hold R and quickly press RIGHT, RIGHT, RIGHT, UP.

Unlock the following costumes by performing the corresponding tasks:

COSTUME - HOW TO UNLOCK
Ratcicle costume - Ratcicle Kingdom Arena. Talk to the character on the right for the costume.
Spike costume - Desert Arena. Talk to the three headed mutant for the costume.
Snipe costume - Wumpa Island Arena. Talk to Crunch for the costume.
Magmaden costume - Junkyard Arena. Take the "Roller" exit with all the Mojo to go to the far side the village and talk to the cub for the costume.
Skeleton costume - Mount Grimly Arena. Go to the area where you first encountered Yuktopus and talk to Uka Uka for the costume.