no
MWario bros.
yes, wario is waluigi's brother. i' have proof too. in Mario party 5 if you put them on a sport team together it says wicked bros. so yes wario and waluigi are brothers
Wario is not playable on New Super Mario Bros. However, he is playable on Super Mario 64 DS....
You cannot play as Wario in the story mode, however he does appear in the minigame Coincentration.