- 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
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