All Psi powers
While playing the game, hold L + R and quickly press B(2), Y, White, quickly click Left Analog-stick, quickly press Y. If you entered the code correctly, the phrase "You cheated" will be spoken.

Maximum rank and all Psi powers
While playing the game, hold L + R and quickly click Left Analog-stick, Right Analog-stick, Left Analog-stick, quickly press White, B, White. If you entered the code correctly, the phrase "You cheated" will be spoken.

All powers upgraded
While playing the game, hold L + R and quickly press B(2), Y, White, quickly click Left Analog-stick, quickly press Y. If you entered the code correctly, the phrase "You cheated" will be spoken.

All items
While playing the game, hold L + R and quickly click Right Analog-stick, quickly press B, White(2), quickly click Left Analog-stick, quickly press Y. If you entered the code correctly, the phrase "You cheated" will be spoken. Note: This does not unlock the Psi-ball Colorizer or Dream Fluffs.

Invincibility
While playing the game, hold L + R and quickly press B, White, B(2), Y, Black. If you entered the code correctly, the phrase "You cheated" will be spoken.

Full lives
While playing the game, hold L + R and quickly click Left Analog-stick, quickly press White(2), B, A, quickly click Right Analog-stick. If you entered the code correctly, the phrase "You cheated" will be spoken.

Full ammunition
While playing the game, hold L + R and quickly click Right Analog-stick, quickly press A, quickly click Left Analog-stick(2), quickly press Y, B. If you entered the code correctly, the phrase "You cheated" will be spoken.

Full Arrowheads
While playing the game, hold L + R and quickly press A, quickly click Right Analog-stick(2), quickly press White, Y, X. If you entered the code correctly, the phrase "You cheated" will be spoken.

New text
While playing the game, hold L + R and quickly press White, A, quickly click Left Analog-stick, quickly press White(2), B. If you entered the code correctly, the phrase "You cheated" will be spoken. This code replaces the characters' names with developer names, shows captions for all the dialogue, and changes the text to numbers and symbols.