At the title screen when the Press The Start Button text is displayed, press A, then hold L + R and press Down, Down, Right, Up to enable cheat mode. If you entered the code correctly, the Press The Start Button text will turn green. The following codes may now be entered:

10,000 extra coins
While playing a game, hold L and press Down, Left, Right, Down, Down. If you entered the code correctly, the message Cheat Activated will appear. Repeat the code to disable its effect.

Invincibility
While playing a game, hold L and press Down, Up, Down, Right, Right. If you entered the code correctly, the message Cheat Activated will appear. Repeat the code to disable its effect.

Restore Pevensie children's health
While playing a game, hold L and press Down, Left, Left, Right. If you entered the code correctly, the message Cheat Activated will appear. Repeat the code to disable its effect.

Level skip
While playing a game, hold L and press Down, Left, Down, Left, Down, Right, Down, Right, Up. If you entered the code correctly, the message Cheat Activated will appear. Repeat the code to disable its effect.

Level select
At the Wardrobe level selection screen, hold L and press Up, Up, Right, Right, Up, Right, Down. If you entered the code correctly, the message Cheat Activated will appear. Repeat the code to disable its effect.