Cast:
- Ariel -
- Prince Eric -
- Melody -
- Young Flounder -
- Sebastian -
- King Triton -
- Grimsby -
- Scuttle -
- Morgana - Adagio Dazzle (My Little Pony: Equestria Girls 2)
- Undertow -
- Undertow (as small size) - Jack-in-the-Box (Fantasia 2000)
- Cloak and Dagger -
- Undertow's Various Transformations -
- Waiter who passes by Melody - Rabbit (Winnie the Pooh)
- The Blonde-Haired Girl in Orange Dress -
- The Chubby Boy in Blue Suit -
- The Skinny Boy in Green Suit -
- The Music Orchestra -
- The Waltzing Children Played By -
- The Handsome Boy -
- The Music Conductor -
- Mother Penguin -
- Baby Penguin -
- 5 Male Penguins -
- Tip -
- Dash -
- Adult Flounder - Sunset Shimmer (My Little Pony: Equestria Girls 1 & 2)'''''
- Flounder's Kids -
- The Blonde-Haired Merboy -
- The Brown-Haired Mergirl -
- The Black-Haired Merboy -
- Harold the Seahorse -
- King Triton's Guards -