Co-Star Luma

The Co-Star Luma is an orange Luma that appears in Super Mario Galaxy 2 as a playable character. The Co-Star Luma appears alongside Mario in the cooperative two-player mode (Co-Star Mode), in which the second player is able to control it using the Wii Remote. The Co-Star Luma can perform moves such as the Star Spin, as well as perform other actions that a single player cannot do, such as immobilize enemies, and picking up far-away objects like 1-Up Mushrooms and bringing them back to Mario. If there isn't a second player, then the Co-Star Luma will appear on Starship Mario.

Trivia

 * The player controlling the Co-Star Luma can make sounds on his/her Wii Remote (as well as player one's) by pressing buttons on the remote.
 * The Co-Star Luma can "dance" with allies, and can even receive Star Bits from other Lumas (excluding Lubba) by pressing A when they're selected and spinning.
 * The Co-Star Luma is similar in function to the 2nd player cursor (which is also yellow) in Super Mario Galaxy.