Ice Age 2: The Meltdown Infinite health
Pause the game and press Up, Right, Down, Up, Left, Down, Right, Left.
Infinite energy
Pause the game and press Down, Left, Right, Down(2), Right, Left, Down.
Infinite pebbles
Pause the game and press Down(2), Left, Up(2), Right, Up, Down.
The image featured at the top of this post is ©The Legend of Heroes: Trails of Cold Steel III key art / Original