Megas XLR - Season 2 Episode 10 : A Clockwork Megas 2005

Coop, Jamie and Kiva teleport themselves to a planet with brainwashed robots who act like sissies and workers. The alien who did it tries to do the same to Megas, but his brainwasher device only works on sentient robots. (Obviously, Coop's doesn't count.) Coop tries to put the alien out of business for good without unnecessarily destroying the prisoners. Coop in the end destroys the mind control device, freeing the robots. He then leaves the planet, unfortunatly as the group leaves it's shown that the planet was actually a prison to the worst robots in the universe. Who start destroying the planet after they leave.