At the Main Menu, choose Password and enter the following.

Password	Effect
CDBD6BB555GB RR8DV111CGDS	All Toons Unlocked.
FBG-7LB555DB RR8CV11SCGDT	Championship Mode As Sponge Bob.
XBG-7LB555DB RR8CV11SCGDT	All Race Tracks Unlocked.