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.

It later turns out that the villains grouped together to save their worlds from Bill Cipher, who had threatened all of reality.

Enemies
Candy Monsters Watchdogs Robo Dragons Norm Bots

Bosses
Gremloblin Lord Hater's Ship Psycho-Bot Norm Bot Inator