<< Enjoy Free Online Teen Titans One on One >> Its good-versus-evil in a slugfest to the finish. Who will be the last one standing?. Teen Titans One on One is a Web-based, yet fast-paced fighting game in the tradition of Street Fighter II. Based on the new series on the Cartoon Network, players can choose any of the show's five heroes and battle their way through a rogue's gallery of villains to eventually the horrifying man-beast known as Plasmus!