Paul Rugg

as Dr. Bolster (voice) (1 episode), as Orderly (voice) (1 episode), as Clerk (voice) (2 episodes)

as Clown (voice) (uncredited) (1 episode)

as Flippy (voice) (1 episode)

as Ned (voice) (20 episodes)

as Inspector (voice)

as Vert Ladderfeller III / Altitooth / Bivouac Ladderfeller (voice) (1 episode)

as Artephius / Papa Bear (voice)

as Chancellor Maniac / Caveman

as Napoleon (voice) (1 episode), Writer

as Mr. Howard (voice) (1 episode)

as Cricket (voice) (40 episodes)

as Savage (voice) (9 episodes)

as Agosto (voice) (2 episodes), as Roberto (voice) (1 episode), as Artephius (voice) (77 episodes)

as Lord Starchbottom (voice) (88 episodes), Writer, Story

as Troll (voice) (1 episode)

as Steve Trilby (voice)

Writer, Creator

as Freakazoid (voice) (1 episode)

as Savage (voice) (13 episodes)

Writer

as Gweelok (voice) (18 episodes)

Story

as Kelsepsian (voice) (1 episode), as Dr. Portillo (1 episode)

Writer

as Baron Vain / Katz (voice)