Waluigi is Wario's brother and his partner-in-crime. Waluigi first appeared in an update video back in 2010, but he didn't appear in any videos until 2013. When he first appeared in Mario's Wig, he didn't have a voice or a name in that video, as he first shown to be an insane man prone to strokes who owns a hair business who only communicates in "WAA" sounds. His first major role was in Wario and Waluigi's Scam!, where Waluigi helps Wario scam Mario. Waluigi is voiced by Logan, although originally he was to be voiced by a fan of Logan's choice after Logan had heard everyone's attempt to make a Waluigi voice impression, which ended up not happening.
He also plays a major role in the Pokemon series, as he is part of Team Rocket.