A game modder by the name of Marioking64DS has implemented Waluigi as a playable fighter in Wii fighting game Super Smash Bros. Brawl. Two videos have been posted to YouTube, one teasing Waluigi in battle, and the other explaining how to add him to the game.
At the end of the teaser video, Black Shadow from racing series F-Zero is previewed, indicating Marioking64DS is working on his inclusion. Images of King K. Rool have also been released for his eventual modding. No arrival date for either of these characters has yet been given.
For those interested in taking down their foes as Waluigi, you can check out Marioking64DS’s tutorial video below: