That's So Raven 2: Supernatural Style (GBA)
CheatingDome.com
Costume mode
Press Left, Right, Up, Down, B(3), Up, Down at the "Press Start" screen. A sound will confirm correct code entry.
Easy health and money
Revisit old levels to replenish health, or stock on some money. It also seems to be endless.
Unlimited energy
Press B(2), L, R, Up, Down, Up, Left, Right at the "Press Start" screen. A sound will confirm correct code entry.