While playing the game, hold L1 + R1 and quickly press R3, Circle, R2(2), L3, Triangle. 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.
All powers upgraded
While playing the game, hold L1 + R1 and quickly press Circle(2), Triangle, R2, L3, Triangle. If you entered the code correctly, the phrase "You cheated" will be spoken.
All Psi powers
While playing the game, hold L1 + R1 and quickly press Circle(2), Triangle, R2, L3, Triangle. If you entered the code correctly, the phrase "You cheated" will be spoken.
Bonus movie
Reach Psi Cadet rank 100 by collecting all Psi-Orbs, Psi-Cards, Cobwebs, Figments, Emotional Baggage, and scavenger hunt items to unlock a bonus movie.
Claw TK attack
Once you have defeated the Lungfish and have entered his mind, your TK attack turns from a hand to a claw.
Full ammunition
While playing the game, hold L1 + R1 and quickly press R3, X, L3(2), Triangle, Circle. If you entered the code correctly, the phrase "You cheated" will be spoken.
Full Arrowheads
While playing the game, hold L1 + R1 and quickly press X, R3(2), R2, Triangle, X. If you entered the code correctly, the phrase "You cheated" will be spoken.
Full lives
While playing the game, hold L1 + R1 and quickly press L3, R2(2), Circle, X, R3. If you entered the code correctly, the phrase "You cheated" will be spoken.
Hidden figments in Edgar Tegley's mind
While in Edgar Tegley's mind (with the dogs and bull), there are two figments that are difficult to find. They are not normally present, and you must unlock a way to find them. Take the window painting with you and place it where the guitar is located. It will no longer teleport you, but instead reveal a figment. Do the same thing at the location where you would place the vines to find the other hidden figment.
Invincibility
While playing the game, hold L1 + R1 and quickly press Circle, R2, Circle(2), Triangle, L2. If you entered the code correctly, the phrase "You cheated" will be spoken.
Maximum rank and all Psi powers
While playing the game, hold L1 + R1 and quickly press L3, R3, L3, R2, Circle, R2. If you entered the code correctly, the phrase "You cheated" will be spoken.
New text
While playing the game, hold L1 + R1 and quickly press R2, X, L3, R2(2), Circle. 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.
Use Levitation without having it equipped
Have three Psi powers equipped, none of them being Levitation. Then, double-jump, hold L1 to glide, then press X while gliding to grab the Levitation Ball. This will work just as if you are using it normally. Note: You must have completed "Milla's Dance Party" in order for this trick to work.