Robot Invasion of Heaven

The Robot Invasion of Heaven ocurred shortly after the inhabitants of Earth evacuated the planet to live on the creature Yivo's body, which was extremely similar to Heaven, leaving control of Earth to the robots. Bender, head of the League of Robots, recieved a letter made out of electromatter from his human friends. Since ekectromatter was the only substance that could harm Yivo, who's body was made of electromatter, Bender decided to bring Earth's population back. With his Army of the Damned and lining their weapons with the electromatter, Bender organized a pirate-themed invasion in honor of his friend Fry. They dragged Yivo from shklis own universe into their own, where they attacked shklim. Eventually, for personal reasons, Yivo abruptly sent Earth's population aboard the robots' vessel and sent them off as shkle retreated to shkler own universe.

Trivia

 * The battle is based on the fight against the Kraken from Pirates of the Caribbean: Dead Man's Chest.