Waluigi is a filler for the Mario sports series and Mario party games also nobody rly lieks him but he is an assist trophy.
There is no official answer, honestly. All we know is they are Mario and Luigi's "evil counterparts." well Mario and luigi are cousins and waluigi and luigi are brothers Mario and Luigi are brothers... and I highly doubt that Wario and Waluigi are cousins with Mario and Luigi.
cause he is dumb (EDIT) uhm, dude meaning that waluigi is dumb doesn't mean he can't be playable in brawl
No. Mario and Luigi are brothers, and Waluigi and Wario are brothers. Wario and Mario; and Luigi and Waluigi are no related in any way. they are only rivals.
noNo. Mario and Luigi are brothers. They are cousins of Wario. Waluigi's relation to them is unknown but he is suspected to be Wario's brother.
Waluigi is not in the game at all. The playable characters are Yoshi, Mario, Luigi, and Wario, but no Waluigi.
Luigi is Mario's brother. Waluigi is Wario's brother. They might all be brothers, though.
No. But Luigi has an evil double named Waluigi.
Two. Mario and Luigi. Wario and Waluigi are not brothers to the Mario bros.
Wario and Waluigi are brothers. They're the evil opposites of Mario and Luigi.
No, though they might be cousins, and Wario and Waluigi might be brothers, but it is uncomfimed.
Newsflash. Waluigi isn't a playable character in New Super Mario Bros. for DS or Wii.
It isn't possible to get Waluigi in Super Mario 64 DS. Only Mario, Luigi, Wario, and Yoshi are playable characters.