We've known for a while that Kuro and Toro, the Sony cat mascots, would find their way into Street Fighter X Tekken. Also, Cole McGrath from inFamous. The inclusion of classic (i.e. shitty) box art Mega Man and Pac-Man also weren't much of a mystery, but their appearance is confirmed in this video, along with the full terms of their inclusion in the Capcom/Namco fighting team-up.
All these characters will naturally be exclusive fighters for the game's PS3 and PS Vita versions. Pac-Man, as you can see, sits atop some kind of mecha-suit, and Mega Man, well, lets just say he looks well past his fighting prime in 1987. At least the costume still fits.
Street Fighter X Tekken arrives March 6 in North America, March 8 in Japan and March 9 in Europe.
[h/t Tommie S]