| Person: |
|
Characters |
Episodes |
| • Dan Castellaneta | voiced | Announcer / Elmo Sputterspark, Megavolt / Megavolt / Megavolt, Nega-Megavolt | 17 Episodes |
| • Katie Leigh (1) | voiced | Honker / Honker, Nega-Honker | 15 Episodes |
| • Susan Tolsky | voiced | Binkie Muddlefoot / Binkie Muddlefoot, Aunt Trudi / Binkie Muddlefoot, Talaya / Binkie, Nega-Binkie / Maid Binketh | 14 Episodes |
| • Michael Bell (1) | voiced | Quackerjack / Quackerjack, Nega-Quackerjack | 11 Episodes |
| • Jim Cummings | voiced | Warden / Hamburger Hippo Cook / Guard Dog / Store owner / Monterey Jack / Horatio / Moliarty / Nega-Herb / King Herbert | 10 Episodes |
| • Rob Paulsen | voiced | Flarg / Fat kid / Steelbeak / Flex / Flarg, Barada | 10 Episodes |
| • Tino Insana | voiced | Bushroot / Bushroot, Nega-Bushroot | 9 Episodes |
| • Kath Soucie | voiced | Princess / Morgana | 9 Episodes |
| • Danny Mann | voiced | J. Gander Hooter | 8 Episodes |
| • Frank Welker | voiced | Nikto / Dr. Gary, Dr. Larson, Dean Tightbill / Ants, Lilliput, Giant snail / Bongo / Slug monster / Guard Dog | 7 Episodes |
| • Jack Angel | voiced | Liquidator / Moloculo Macawber / Liquidator, Nega-Liquidator | 6 Episodes |
| • Dana Hill | voiced | Tank Muddlefoot / Tank, Nega-Tank | 6 Episodes |
| • Hamilton Camp | voiced | Jock Newbody / Gizmoduck | 5 Episodes |
| • Ronald Feinberg | voiced | Agent Grizlicoff | 5 Episodes |
| • S. Scott Bullock | voiced | Talking Refrigerator / Tom Lockjaw | 5 Episodes |
| • Kenneth Mars | voiced | Tuskernini | 4 Episodes |
| • Neil Ross | voiced | Wrestling announcer / Dan Gander / TV / Nodoff | 4 Episodes |
| • Hal Rayle | voiced | Hammerhead / A. F. Arret / Boss Ninja | 4 Episodes |
| • Candi Milo | voiced | Duck Ling / Dr. Sara Bellum | 3 Episodes |
| • Mitzi McCall | voiced | Ammonia Pine | 3 Episodes |
| • Tim Curry | voiced | Taurus Bulba | 3 Episodes |
| • Charlie Adler | voiced | Cameraman / Mister Mikey, Yellow Cute Little Lost Bunny / Mr. Trenchrot | 3 Episodes |
| • Tress MacNeille | voiced | Webwa Walters / Chip / Oprah Windbag | 3 Episodes |
| • B. J. Ward | voiced | tour guide / Computer voice, Patricia / Woman | 3 Episodes |
| • Christine Cavanaugh | voiced | Girl at prom / Nega-Gosalyn | 2 Episodes |
| • Richard Karron | played | Newt Blemmer / Joke shop owner | 2 Episodes |
| • Ruth Buzzi | voiced | Alien Cow / Dottie Debson | 2 Episodes |
| • Marcia Wallace | voiced | Clovis, Mrs. Cavanaugh | 2 Episodes |
| • Susan Silo | voiced | Neptunia | 2 Episodes |
| • Townsend Coleman | voiced | Patrick / Wacko | 2 Episodes |
| • Dani Staahl | voiced | Splatter Phoenix | 2 Episodes |
| • Eddie Deezen | voiced | Hoof | 2 Episodes |
| • Lorenzo Music | voiced | Spider / Mole | 2 Episodes |
| • Ellen Gerstell (1) | voiced | Ample Grime / Female police officer | 2 Episodes |
| • Teresa Ganzel (1) | voiced | Flygirl / Preena Lott | 2 Episodes |
| • Victoria Carroll | voiced | Beatrice Brute / D-2000 | 2 Episodes |
| • Michael Gough (2) | voiced | Jambalaya Jake | 2 Episodes |
