World 5-5 (New Super Mario Bros. Wii)

This level has the player jumping across the screen on the backs of giant green Jumbo Rays. For the most of this level, the player has to avoid Bullet Bills and can't touch the ground as they're in the sky. The player is also given Propeller boxes which become useful as a lot of the level is also covered in clouds.

Aids

 * Jumbo Rays

Enemies

 * Bullet Bills

Trivia

 * Although this level has Bullet Bills, Bill Blasters do not appear.