Waluigi

waluigi is wario's brother Waluigi is Luigi's rival in a similar way Wario is Mario's antagonist. He wears a similar outfit like them, except that his hat emblem is an inverted 'L'. He's also very tall and has long legs and arms.

His first appeareance was in Mario Tennis for the Nintendo 64. Since then, Waluigi has only appeared in Mario spinoff games. This leads to believe that his creation was solely on the purpose to give Wario a partner on spinoff games in the same way Mario and Luigi are a team in those.