Mike (18 episodes, 2021-2024)
Val (16 episodes, 2021-2024)
Fritz (16 episodes, 2021-2024)
Duncan / Father / Richard (16 episodes, 2021-2024)
Cutter / Carla / Maria / Rosie / Bean / Mother / Narrator (16 episodes, 2021-2024)
Tylor (16 episodes, 2021-2024)
Needleman / Smitty / Sanderson / Chuck (16 episodes, 2021-2024)
Sulley (14 episodes, 2021-2024)
Phlegm / Fungus / Additional Monsters / Charlie / Ted / Bathroom Monster / Don / Four-Eyed Monster / Little Boy / McLean / Restaurant Patrons / Rudy / Sidewalk Monster (14 episodes, 2021-2024)
Roze / Roz / Bob Peterson (11 episodes, 2021-2024)
Additional Monsters / Hazel / Addie / Josephina / Kurtz / Lanky / Lisa / Student Monsters (10 episodes, 2021-2024)
Roto / Otis / Bobs / Chalooby (9 episodes, 2021-2024)
Celia Mae (8 episodes, 2021)
Banana Bread / Additional Monsters / Chauncey / Chompy / Neighbor Monsters / Robot Kid (8 episodes, 2021-2024)
Ms. Flint (7 episodes, 2021-2024)
Additional Monsters / Snore (7 episodes, 2021)
Josh Rivera / Additional Monsters / Business Monster / David / Jebediah / Restaurant Patron / Rudy the Service Monster (6 episodes, 2021-2024)
Johnny (5 episodes, 2024)
Roger Rogers (5 episodes, 2024)
Bernard / Adorable (5 episodes, 2021-2024)
Millie (4 episodes, 2021-2024)
Brian / Convention Monsters / Kenny / Large Monster / ROmegaR Bro / Restaurant Patron / Scared Monster / Student Monsters (4 episodes, 2024)
Grandma Tuskmon / Grandma Tuskman (3 episodes, 2024)
Chet (3 episodes, 2024)
Mr. Crummyham (3 episodes, 2021)
Claire (3 episodes, 2024)
Lorelei (3 episodes, 2024)
J.J. (3 episodes, 2024)
FearCo. Receptionist / Adult Monster / MNN Receptionist / MU Student (3 episodes, 2024)
Gary (2 episodes, 2021)
Jill (2 episodes, 2024)
Jack (2 episodes, 2024)
Additional Monsters / Fan Monster (2 episodes, 2021)
Celia Mae (2 episodes, 2024)
Professor Knight (2 episodes, 2021-2024)
Fancy Monster / Fear Co. Narrator / Restaurant Patron (2 episodes, 2024)
Declan (2 episodes, 2024)
Joy (2 episodes, 2024)
Slappy / C.R.E.E.P. Worker (2 episodes, 2024)
Ben (2 episodes, 2024)
Little Girl Monster / Monster Kids (2 episodes, 2024)
Argus (1 episode, 2021)
Bob Yucker (1 episode, 2021)
Evan (1 episode, 2024)
Thalia (1 episode, 2021)
Marilyn (1 episode, 2024)
Alistair Clawbottom (1 episode, 2024)
Marcus (1 episode, 2021)
Maître d' / Michel / Pierre (1 episode, 2024)
Terry (1 episode, 2024)
Sunny (1 episode, 2024)
Neighbor Monsters (1 episode, 2024)
Alexander (1 episode, 2021)
Spin-Ergy Instructor Monster (1 episode, 2024)
Tiny Monster (1 episode, 2024)
Oscar (1 episode, 2021)
Additional Monsters (1 episode, 2021)
Avani (1 episode, 2024)
Gurty (1 episode, 2021)
Bully Monster 1 / Mr. April (1 episode, 2024)
Skyler (1 episode, 2024)
Bully Monster 2 / Scream Can Mascot (1 episode, 2024)
Janitor (1 episode, 2024)
Stubby Lizzardo (1 episode, 2024)
Ethan (1 episode, 2024)
Additional Monsters (1 episode, 2024)
Manny (uncredited) (1 episode, 2021)