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.