The villains are a big part of what makes Aqua Teen Hunger Force so funny and psychotically unique, even among Adult Swim cartoons. From Dr. Weird to the Mooninites, these "bad guys" are so bizarre, they make more traditional animated villains look as boring as wheat bread.
Obviously, Carl is still king in this universe, but without the Plutonians or MC Pee Pants, the ATHF would have no one to face off against. You can't really call what happens between the heroes and these guys "battle," because Aqua Teen Hunger Force adventures almost always come down to a lot of annoyance and retaliatory explosions, followed by a complete lack of resolution.
So, without further ado, here are the best of the best ATHF villains. Vote up the weirdest, most inexplicable characters ever to squabble with the heroes of Aqua Something You Know Whatever.