Meh, I don't really think much about them, but I suppose that they do need some spotlight time.

i don't like them because they beat up on mario and luigi for no apperent reason but i don't hate their guts their just not very important. :)

WaLuigi is so neglected.
If they were in the same game it would be kinda like the Three Stooges.
They would stick together but constantly have disagreements that result in humorous cartoon violence.

Regardless they make me barf

I HATE WARIO SOOO MUCH...

Cannot stand them but I suppose they should get some spotlight time

It'd make a change from playing as Mario and Luigi.

Waluigi is so awesome. I'd love to see them starring their own game, with along with all the villains

I mean Wario already has his own dedicated spin-offs in the form of the Wario Land series and WarioWare, but it would also be cool to see Waluigi tag along.

What I'd really love to see is a Mario and Luigi RPG where you can switch between the Mario Bros. and the Wario Bros.