All codes are entered during gameplay, or in Jack's house. Also, there are confirmation sounds when cheats are entered correctly. The sound is what you hear when you make a selection on any menu in the game. Also, the cheats will not work if you're entering them while you're getting hit so make sure you're in a safe open area or be really fast at inputting the codes. You're able to still save the game when using these cheats so don't panic.

Effect	Code
(Jack's house) All costumes.	Up, Down, Left, Right, Click The Right Stick, Click The Left Stick.
(Jack's house) Unlock all figures and songs. ( which also grants you the reward for getting them UNLIMITED PUMPKIN KING POWER)	Up, Up, Click The Right Stick, Up.
*MUST ENTER BEFORE MUSIC/DANCE* Game plays the music/dance battle for you. You're still able to save when you use this cheat regardless what you read.	Left, Up, Right, Down, Left, Click The Right Stick, Click The Left Stick.
Refill health.	Click The Right Stick, Click The Left Stick, Click The Right Stick, Up.
Unlock all Santa Jack weapons. (Should require the outfit)	Up, Right, Left, Down, Click The Left Stick, Click The Right Stick.
Upgrade Soul Robber.	Up, Right, Left, Down, Click The Right Stick, Click The Left Stick.