- Mordecai as Mike
- Rigby as Sulley
- Margaret as Celia Mae
- Robbie Rotten (from LazyTown) as Randall Boggs
- Benson as Mr. Waternoose
- Zim, Gir and Minimoose (from Invader Zim) as Needleman and Smitty
- Blitzo, Moxxie, Millie and Loona (from Helluva Boss) as Yeti the Abominable Snowman
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