The Grim Adventures of Billy and Mandy (2001)
S7E8 Hey, Water You Doing?
Episode Overview
Disappointed by the lackluster submarine ride at Sassy Cat amusement park, Billy, Mandy, and Grim embark on a real underwater adventure thanks to Grim's magic. However, they soon find themselves facing execution for invading the Googen Kingdom, ruled by King Triceps, a merman with a wrestling background. The king’s daughter, Hariel, a mermaid, intervenes to save them and proposes marriage to Billy to claim the throne. It turns out that King Triceps is actually Hariel's sister, the cunning sea witch Uvula, leading to a fierce rivalry. The chaos concludes when Billy agrees to marry both sisters. Ultimately, it’s revealed that this tale is just a story Billy is recounting to Miss Butterbean, who inquires about his missing report.