Co-Star Luma

Co-Star Luma is an orange Luma that appears in Super Mario Galaxy 2 as a playable character. 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 only with the Wii Remote. Co-Star Luma can perform moves such as the spin, and also 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.

Trivia

 * The player controlling the Co-Star Luma can make sounds on their and the other person's Wii remote by pressing buttons on their Wii remote.
 * The Co-Star Luma can dance with allies, and can even receive starbits from other Lumas (excluding Lubba) by clicking A when they're selected and spinning.