No. They're more like Mario and luigis evil twins.
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.
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.
Yes: there is Yoshi, Mario, Luigi, Wario, Peach, Daisy, Toad, and Waluigi.
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.
Wario and Waluigi are brothers. They're the evil opposites of Mario and Luigi.
WARIO IS COUSIN and they are RIVALS
You flip the m in mario up side down to make it wario and you just add a wa to luigi for waluigi.
Waluigi is Luigi's enemy. Just like Wario is Mario's enemy.
Luigi is Mario's brother. Waluigi is Wario's brother. They might all be brothers, though.
No, though they might be cousins, and Wario and Waluigi might be brothers, but it is uncomfimed.
Indeed they are enemies. Waluigi is to Luigi as Wario is to Mario - bitter rivals. Heck, Waluigi's hat has a backwards L.
no. they are brothers and everybody knows that. Wario and Waluigi are their evil twins.