Cast[]
- Seymour Krelborn - Dipper Pines (Gravity Falls)
- Audrey - Pacifica Northwest (Gravity Falls)
- Mr. Mushnik - Stanley "Grunkle Stan" Pines (Gravity Falls)
- Orin Scrivello - Francis (Fairy Oddparents)
- Audrey II/Twoey - Petey Pirahna (Mario Bros. Franchise)
- Crystal, Ronette, and Chiffon - Heather, Gwen, and Courtney (Total Drama)
Musical numbers[]
- "Prologue: Little Shop of Horrors"
- "Skid Row (Downtown)"
- "Da-Doo"
- "Grow for Me"
- "Somewhere That's Green"
- "Some Fun Now"
- "Dentist!"
- "Feed Me (Git It)"
- "Suddenly, Dipper"
- "Suppertime"
- "The Meek Shall Inherit"
- "Suppertime (Reprise)"
- "Suddenly, Dipper (Reprise)"
- "Mean Green Mother from Outer Space"
- "Little Shop of Horrors medley" (end credits)
Original ending[]
- "Somewhere That's Green (Reprise)"
- "Mean Green Mother from Outer Space"
- "Finale (Don't Feed the Plants)"