Lazlo / Golly Gopher
Jeff the Spider (voice)
Hoss Delgado / Fiskerton (voice)
Numbuh 4 / Toilenator / Echo Echo / Humongousaur / Swampfire (voice)
Van Kleiss (voice)
Aku (voice)
Marie Kanker (voice)
Johnny Bravo / Ace / Azmuth (voice)
Vilgax / TOM / Demongo (voice)
V.V. Argost (voice)
Blossom (voice)
Kevin Levin (voice)
Dee Dee (voice) (as Kathryn Cressida)
Fuzzy Lumpkins (voice)
Buttercup (voice)
Mandark (voice)
Coop (voice)
The Scotsman / Schnitzel / Bobo Haha / Jake (voice)
Numbuh 1 / Numbuh 2 (voice)
Grim (voice)
Grandpa Max (voice)
Tetrax Shard (voice)
Blooregard Q. Kazoo (voice)
May Kanker (voice)
Courage (voice)
Fred Fredburger (voice)
Frances 'Frankie' Foster / Mandy (voice) (as Grey DeLisle)
Princess Morbucks (voice)
Stickybeard (voice)
Ed (voice)
Chickens from Outer Space (voice)
Billy (voice)
Mojo Jojo (voice)
Lee Kanker (voice)
Gwen Tennyson (voice)
Chowder (voice)
Professor Utonium / Him / Mr. Herriman (voice)
Eduardo / Mayor / Ice King (voice)
Agent Six (voice)
Father (voice)
Samurai Jack / Wilt / Dracula (voice)
Zak Saturday (voice)
Ben Tennyson / Albedo (voice)
Mac (voice)
Paradox (voice)
Four Arms (voice)
Juniper Lee (voice)
Dexter / Coco / Cheese (voice)
Doc Saturday (voice)
Major Glory (voice)
Hex (voice)
Octus (voice)
Computress (voice)
Mordecai (voice)
Demongo
Alan Albright (voice)
Rex (voice)
Rigby (voice)
Eddy (voice)
Thromnambular (voice)
Finn (voice)
Bubbles / Ilana (voice)
Drew Saturday (voice)
Numbuh 5 (voice)
Lance (voice)
Numbuh 3 (voice)
Flapjack (voice)
Edd (voice)
Princess Bubblegum (voice)