While playing story mode, pause the game. Hold guard and press the following buttons on the D-pad very quickly! To deactivate a cheat, enter it's code again.

Code	Effect
Down, Down, Down, Up	Crash freeze any enemy he touches.
Left, Left, Left, Down	Make diffrent parts of Crash bigger.
Left, Right, Left, Right	Crash turns into a shadow.
Right, Right, Right, Up	Enimies leave behind Wumpa fruit.
Up, Down, Down, Up	Enemies leave behind 'Evo-Wumpa' (Purple fruit).
Up, Right, Down, Left	Enemies leave behind Super kick.
Up, Up, Up, Left	Enemies leave behind x4 damage (Boxing glove).