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. If there isn't a second player, then Co-Star Luma will appear on Starship Mario. Co-Star Luma also appeared next to the game's logo.

Trivia

 * The player controlling Co-Star Luma can make sounds on his/her and player one's Wii Remote 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 to the 2nd player cursor (which is also yellow) in Super Mario Galaxy except there is an actual Luma in Super Mario Galaxy 2.