Zombozo (Classic)

Zombozo (voiced by John Kassir) is a vampire-like clown(dwayne mcduffie has confirmed thet he is a zombie) that feeds on the happiness of others. Dressed in appropriate attire, he stages shows to bring people in and then uses a machine he calls the "Psyclown" to drain the happiness and life energy from them, leaving them depleted and sad. In the most extreme cases, it even seems to age people. During all this, his minions strip the town of all it's valuables. He was eventually defeated when Ben who overcame his fear of clowns and terrorized Zombozo as Ghostfreak by peeling back his skin, causing him to explode in a burst of confetti (At this point, was that Ben, or Ghostfreak? Ben implies that Ghostfreak may have taken over when he says "Whoa! That kinda even freaked me out.").

While Zombozo's henchmen reappeared in a future episode, he himself did not for all the original serie. The three indicate that they have not seen the clown since his defeat.

Aside from feeding from happiness, Zombozo had other abilities: he could also teleport in an explosion of smoke and confetti, manipulate reality to scare opponents and float (although the latest was only possible when attached to the Psyclown).

He seemed to enjoy making dark jokes about his enemies and his feeding, even when acting (i.e.: "Laughter truly is the best medicine...for me!")

Powers and abilites
In his original appearance, Zombozo was using a machine called the "Psyclown" to give him the abilitie to drain happiness from people when they're laughing. These left them depleted, weakened and sad. In the most extreme case, it even seemed to age people, as it did with Gwen. The machine was connected to him by a line, giving him the abilitie to fly.

In addition to the Psyclown, Zombozo was able to teleport in an explosion of smoke and confetti(he took Ghostfreak's purple energy,that was demonstrated in Ghost Town and manipulated on him to create an explosion) He terorised Ben with frightening images. It's unknown he was manipulating reality or merely creating illusions.

Ultimate Alien
Zombozo will reppear in Ben 10: Ultimate Alien, in the episode Hit 'Em Where They Live, revealing that he survived after his defeat and leading a group of villains to hunt down Ben's family for revenge, such as Charmcaster, Vulkanus, Sevenseven, and Rojo. His appearance has changed, such as redder hair, the spheres on his hat and sleeves are gone, has a black nose instead of dark blue, he has a purple smile painted on his face, and purple gloves. This will be his first appearance from his long absence since Last Laugh.