Super Smash Brothers - It has been expanded upon

Mario and Sonic: Olympics and Brawl
Mario and PacMan: Mario Kart Arcade GP
Sonic and Mega Man: Worlds Collide
Sonic and PacMan: Wreck-it Ralph
Mega Man and PacMan: NamcoxCapcom (kind of)
They've each met each other before (except possibly Mario and Mega Man), now they finally all come together.

>Expand Dong joke

>Donkey Kong nowhere in sight

0/10.