Yo Bro

Yo Bro appeared in 2003 video game called Mario & Luigi: Superstar Saga. The Yo Bro is a Hammer Bro variant encountered at Woohoo Hooniversity in Mario & Luigi: Superstar Saga. Its name and appearance reference hip-hop culture, with "yo" and "bro" being commonly used slang; the name is also a pun on "yo-yo" and Hammer Bro. It sports a fez with a small plant on the front, a medallion on its neck, and two yo-yos based on Koopa Shells, one red and one green. Yo Bros. only appear in battle, often alongside Laser Snifits.

In battle, the yo-yo it spins will indicate whether it attacks Mario or Luigi. It has a charge-up ability that lets it deal more damage, and can also feint an attack, which is indicated when the "spinning" sound is not heard. Like other Koopa-like enemies in the game, Yo Bros. are healed by fire, though they are weak to thunder.