Yo Bro

Yo Brothers, also called Yo Bros. are an enemy encountered in Woohoo Hooniversity during the events of Mario & Luigi: Superstar Saga. The enemy was vaguely Koopa-like and sported a magician's hat and cape. Yo Bros also hold two yo-yos, one red and one green. Whichever yo-yo it spun indicated which Mario brother it would attack.

Trivia

 * Unlike most creatures in the Hooniversity, which were themed after "smart" items, such as robotics and vitamins, the Yo Bro. resembles more of a "street" look.