His stupidity has seemingly given him the power to be extremely oblivious to pain as in many episodes he is shown to be having his own flesh rip apart like his nose exploding or bones jutting out from his body. He is also scared of the mailman and spiders, which is quite unfortunate because he is Jeff's father (Billy hatched his egg), and Jeff is a huge spider. Billy is terrified of clowns to the point of having recurring nightmares about them, although eventually, due to an encounter with his inner frat boy, his fear is transformed into a psychotic loathing and hatred for them, as shown in Attack of the Clowns. While Billy is the most innocent character of the three, he ends up causing the most problems due to his irrational and often impulsive choice of actions, usually by deliberately doing what the others expressly told him not to do. Although good-natured and happy-go-lucky, he has occasional fits of stubbornness, violence, anger, and rage, which shows insanity that even Mandy seems to fear. Billy, despite being a complete moron, sometimes has random bursts of cleverness and cunning, especially when he wishes to attain his said foolish desires. Personalityĭue to Billy's idiotic, foolish desires, which he orders Grim to bring about, he is often the cause of Grim and Mandy's mishaps. Mandy cheated, and Grim was doomed to be the "best friend" of the two kids for all eternity. Grim, assured of his victory, sweetened the deal on their behalf by promising that if they win, he would be their best friend "forever and ever." Grim took Billy and Mandy to play, where they competed in Grim's favorite game-limbo.
If the Reaper wins, he would get the hamster's soul. However, Mandy refused to give the Reaper the hamster and offered to play a game for its soul instead. Snuggles, the Grim Reaper appeared to claim the old hamster's soul. Years later, while Billy and Mandy were celebrating the tenth birthday of his pet hamster, Mr.
According to Harold, that day was the start of Billy and Mandy's friendship. Billy simply laughed and said, "She digs me". Angered, Mandy punched Billy in the face, calling him a creep, and slammed the door in his face. When he pointed out that she had no nose, he proceeded to shove an ice cream cone into her face, apparently creating a makeshift nose for her. When she did, the first thing she said to him was, "Are you some kinda idiot?". Billy and Mandy met as babies when he came over to her house, repeatedly ringing her doorbell to annoy her enough to answer.