Tatsunoko vs. Capcom: Ultimate All-Stars

Tatsunoko vs. Capcom: Cross Generation of Heroes is a fighting game released for arcade & Wii. It features MegaMan Volnutt from the MegaMan Legends series & Roll from the Classic series as playable characters. It is currently only released in Japan, however, Capcom USA is working to deal with Tatsunoko licensing issues, although they are not optimistic on it being released overseas

Trivia

 * There is a rumor that Tatsunoko vs Capcom will be released overseas with the Tatsunoko characters, songs, stages, and endings removed and replaced with Marvel characters, songs, stages, and ending as Marvel vs Capcom 3.