Waluigi is Luigi’s arch rival, Wario's best partner the most popular tennis player that ever matches from his point of view. He often refers to himself as “big shot” for showing off the opponents after winning in every match but he’ll never compete against Mario and Luigi while Wario wasn’t around. He’s a lanky, impertinent person but outside of the tennis tournament, he’s been showing his gladsome care towards other people, especially Yuri frequently.