Name	Known for
Richard Steven Horvitz Zim (voice) Zim (voice) See fewer	Invader ZIM: Enter the Florpus (2019)
Rikki Simons GIR / The Enigma - Monster #3 / Whitecoat #2 (voice) (as Rosearik Rikki Simons) GIR / The Enigma - Monster #3 / Whitecoat #2 (voice) (as Rosearik Rikki Simons) See fewer	Invader ZIM (2001)
Andy Berman Dib Membrane / Nightmare Dib (voice) Dib Membrane / Nightmare Dib (voice) See fewer	Psych (2006)
Melissa Fahn Nightmare Gaz (voice) Nightmare Gaz (voice) See fewer	Cowboy Bebop (1998)
Lucille Bliss Ms. Bitters (voice) Ms. Bitters (voice) See fewer	Cinderella (1950)
Rodger Bumpass Professor Membrane / Nightmare Membrane / Nightmare Bitters (voice) Professor Membrane / Nightmare Membrane / Nightmare Bitters (voice) See fewer	SpongeBob SquarePants (1999)
Mo Collins Zita (voice) Zita (voice) See fewer	Parks and Recreation (2009)
Phil LaMarr The Letter M / Whitecoat #1 (voice) The Letter M / Whitecoat #1 (voice) See fewer	Pulp Fiction (1994)
Jhonen Vasquez Brian / Yolk - Monster #2 (voice) (as Mr. Scolex) Brian / Yolk - Monster #2 (voice) (as Mr. Scolex) See fewer	Invader ZIM (2001)
Antoinette Spolar Mary / Horrified Child (voice) Mary / Horrified Child (voice) See fewer	American Wedding (2003)
Kevin Michael Richardson Hummelflesh - Monster #1 / Scientist (voice) Hummelflesh - Monster #1 / Scientist (voice) See fewer	Mortal Kombat (1995)