First, let’s address the biggest issue in localizing Tatsunoko vs Capcom: Ultimate All-Stars: it's full of insanely obscure characters. Not only are nearly all the Tatsunoko characters unknown to all but the most devoted, long-time anime fans, but Capcom also threw in some of its own people who haven’t been seen in years. So to relieve you of your confusion, we present the 28 characters of Tatsunoko vs Capcom. With our help, and a nod to YouTube, you'll be confused no more.
Unless stated otherwise, all the videos are the openings to the first series that the characters appeared in. And at least three characters have yet to be announced for the Ultimate All-Stars version of the game, so this list is as complete as it currently can be. Stay tuned for updates when the rest are announced.