Here is a small list of some of the games with characters appearing in Street Fighter X All Capcom;

Lost Planet, Viewtiful Joe, Asura's Wrath, Ghost Trick, Darkstalkers, Okami, Ace Attorney, Devil May Cry, Resident Evil, Mega Man, Monster Hunter, Final Fight, and Street Fighter.

So yeah, being a Capcom mega-fan, of course I had to do a quick hands-on with this currently Japan-only card battler. And here it is...