Rainbow Mario

Rainbow Mario is a special form of Mario that appears in Super Mario Galaxy and Super Mario Galaxy 2. Mario can reach this form by obtaining a Rainbow Star. It makes Mario invincible, much like the Super Star, but the effects of the Rainbow Star are more extensive and longer-lasting than those of a Super Star, and Mario can break through certain objects. However, he earns Star Bits by defeating enemies instead of extra lives, and he cannot combine this power-up with any other power-up; if Mario touches one while invincible, the other item will be kicked off-screen. As Rainbow Mario runs, he changes colors (but in Super Mario Galaxy 2, Mario and Luigi just turn red), and leaves a rainbow-colored afterimage trail behind him. The music as well as Mario himself will increase in speed while in use, making Mario harder to control until it runs out.

Trivia

 * Rainbow Mario's theme is a re-orchestration of the classic invincibility theme, with the same melody heard from Super Mario World 2: Yoshi's Island and Super Mario 64.
 * The artwork for Rainbow Mario is similar to Invincible Mario's artwork; Mario's poses in both artworks are identical, though he faces a different direction in each artwork.