K'nuckles was the most interesting, because even though he was a main character and hung out with the heroes, he was never on the "good" side. He did what he wanted, when he wanted, but was always held back by his secret affection towards flapjack and was a sort of father figure to him. Not good, but not bad either. For an episode, either the one with punsie mchale or the magic genie island. The one where flapjack hangs out with the royal people and they rub off on him was good too.