Astro Boy:The Video Game for Wii

Invulneable
Pause the game and press Up, Down, Down, Up, 1, 2.

Max Stats
Pause the game and press Left, Left, 2, Down, Down, 1.

Indifinite Supers
Pause the game and press Left, 1, Right, 1, Up, Down.

Indifinite Dashes
Pause the game and press 2, 2, 1, 2, Left, Up.

Disable Supers
Pause game and press 1, 1, 2, 2, 1, Left.

Costume Swap(Arena and Classic Costumes)
Pause the game and and press 2, Up, 1, Up, Down, 2.

Unlock Levels
Pause the game and press Up, 1, Right, 1, Down, 1. This allows you to travel to any level from the Story menu.