Disney XD Villains Unite!

Villains Unite! is an online game, that crosses over several Disney animated shows. It was released June 17, 2014.

Plot
Heinz Doofenshmirtz has created the "Evil-Gathering-inator", which summons villains from different worlds to take control of worlds together. Heroes such as Perry the Platypus, Dipper and Mabel Pines, Wander and  Sylvia, and Randy Cunningham join forces to stop the villains and save their worlds.