The Simpsons/Mermaid Sister's Best Friend

Cast

 * Lisa as Shelly
 * Maude Flanders as Coral
 * Marge as Ariel
 * Lenny as Flounder
 * Bart as Sebastian
 * Principal Skinner as King Triton
 * Homer as Scuttle
 * Wendy Tasteburger (from South Park) as Melody