Quarrel Castle is the home of married sorcerers Selwyn and Tallulah, their pet gargoyle Tharp, and the ghost of their Uncle Fenwick. It is so named because it is where the married couple always argue with each other. In the episode "Memory Melons", the castle was nearly destroyed when the couple's marital spats became so powerful that they created a storm that would have consumed the entire Smurf Forest. Fortunately, when Selwyn and Tallulah finally came to their senses and used their power together to make the storm cease, they also restored the castle.