I would have to say SSBB MWR or Mkwii.
cod mwr it is
super smash bros brawl
IM A FIRIN MY LAZZAH!!!!!!!!!
Mario vs. DK: Minis march again fc:1205-6940-3018
I also have WarioWare DIY Showcase
Wii FC: to ur left
most of all the call of dutys are played online, super smash bros brawl is played alot online too, and its fun! mario kart and the conduit are played alot online too
SSBB FC: 3739-4111-1450
Wii FC: 5250-4240-2298-2550