Grim gets Billy and Mandy into sorcery school; Mindy befriends Grim; Grim brings monster cards to life.
Grim gets sick; zombies crave the brownies Billy makes.
In the future, Mandy rules the world; Billy helps Eris spread chaos; Mandy and Billy are forced to share a room.
Mandy visits a haunted house; Irwin turns into a werewolf.
Grim falls for a Goth girl; Mandy develops a crush; Nergal attempts to woo Billy's aunt.
Billy hatches a giant spider; Grim tries to help Billy pass a test; Grim tries to stop a show from being canceled.
Billy and Mandy contend with Nergal Jr.; Grim thinks he is a nun; Grim and the children enter a kart competition.
Billy tries to show off at the Renaissance festival; Grim sings in a band; Billy and Mandy visit the Halls of Time.
After losing a bet to two children, the grim reaper must be their best friend forever.
A headless man from Grim's past uses Billy to steal Grim's scythe.