From the Main Menu move to the Extra menu, when inside the Extras Menu Select Cheat Codes from there enter one of the following codes.

Password	Effect
SNEAKER	All Awards Achieved!
FRIVERS	All Concept Art Unlocked!
GUDGEON	All Levels Unlocked!
CURLING	All Minigames Unlocked!
CAKEDAY	Inf Nova Enabled!
KRUNKIN	Invulnerability Enabled!
UNICORN	Rainbow Trail Active!
CODMODE	Weak Enemies Enabled!