If Microsoft made a game like Smash Bros, what characters/levels would be included?

[Veknoid_Outcast]

Interesting question. Here's my list:

Master Chief
Blinx
Abe/Munch
Ryo Hazuki
Banjo/Kazooie
Conker
Cooper Chance
Kameo
Joanna Dark
Arbiter
Jack of Blades
Rash/Zitz/Pimple
Juno/Vela/Lupus
Marcus Fenix

Rare would be very important for such a game.