South Park and Codename: Kids Next Door/The Little Mermaid

Cast

 * Wendy Testaburger as Ariel
 * Stan Marsh as Prince Eric
 * Kyle Broflovski as Flounder
 * Numbuh 4 as Sebastian
 * Numbuh 1 as King Triton
 * Numbuh 2 as Scuttle
 * Shelly Marsh as Ursula
 * The Interesting Twins From Beneath The Mountain as Flotsam and Jetsam