[raniya ali]

if you already connected to the internet

[Floopy Koopy]

You can play mario kart wii or ds if you consider super smash bros a mario game you can play viva wi-fi on it you can go to www.supermariobrothers.org and download SMBX you can co-op just simply attach a USB keyboard and do co-op

[trevor]

Mario Kart wii,Smash bros. brawl if you wanna not be technical,Mario strikers charged,Dr.Mario.

[FullOfQuestions]

Mario Kart Wii AND Super Smash Bros Brawl are both Mario games that you can play with others over Wi-Fi.

[Nomnivore]

Mario kart is the only 1 to my knowledge

[Timothy]

Mario Kart is the only one right now I believe.