The Legend of Spyro: Dawn of the Dragon (PS3)

Maximum XP:
Pause the game, then hold R1 and with the left stick press Left, Right, Right, Up, Up.

Unlimited Life:
Pause the game, then hold L1 and with the left stick press Right, Right, Down, Down, Left.

Unlimited Mana:
Pause the game, then hold R1 and with the left stick press Up, Right, Up, Left, Down.

Unlock all Elemental Upgrades:
Pause the game, then hold L1 and with the left stick press Left, Up, Down, Up, Right.