- James Marsden - Sir Brad Starlight (voice)
- 'Weird Al' Yankovic - Dr. Screwball Jones (voice)
- Sabrina Carpenter - Melodie (voice)
- Rob Riggle - Bill (voice)
- Ken Marino - Phil (voice)
- Bryan Callen - Gil (voice)
- Laraine Newman - Gram (voice)
- Clancy Brown - Badlands Dan (voice)
- Bill Fagerbakke - Prince Cashmere (voice)
- Aziz Ansari - Westley (voice)
- Tara Strong - Beeza (voice)
- Corey Burton - Captain (voice)
- Charlie Adler - Stok (voice)
- Kevin Michael Richardson - Clipper (voice)
- Kevin Michael Richardson - Papa Doom (voice)
- Edie McClurg - Trudi (voice)
- Kari Wahlgren - Janet (voice)
- René Auberjonois - Maurice (voice)
- Jeff Bennett - Brainz (voice)
- Jeff Bennett - Harvax (voice)
- Genevieve Hannelius - Little Bits (voice)
- Rich Fulcher - Evil Sandwich (voice)
- Rich Fulcher - Queen / Worm (voice)
- Steve Blum - General Outrage (voice)
- Sam Riegel - Emperor Awesome (voice)
- Sam Riegel - Admiral Admirable (voice)
- Sam Riegel - Cartoon Awesome (voice)
- Dwight Schultz - Wild Card (voice)
- Fred Tatasciore - Dracor (voice)
- Fred Tatasciore - Dragon King (voice)
- Fred Tatasciore - Mooplexian (voice)
- Fred Tatasciore - Thrax (voice)
- Fred Tatasciore - Lost and Found Guy (voice)
- Fred Tatasciore - Pit Monster (voice)
- Fred Tatasciore - Lord Dominator (voice)
- Fred Tatasciore - Kragthar (voice)
- John Hodgman - Lord of Illumination (voice)
- Will Arnett - Ryder (voice)
- June Squibb - Stella Starbella (voice)
- Jennifer Hale - Ripov (voice)
- Jennifer Hale - Princess DeMurra (voice)
- Kevin McDonald - Sherblorg King (voice)
- Andy Daly - Andy the Watchdog (voice)
- Calum Worthy - Teen Leader (voice)
- Josh Sussman - Weasly Teen (voice)
- Jon Hamm - Cartoon Hater (voice)
- Eddie Deezen - Cartoon Peepers (voice)
- Frank Welker - Announcer (voice)
- Jason Ritter - Skipper (voice)
- Kristen Schaal - Mavis (voice)
- Alex Hirsch - Old Man / Soosy Du (voice)
- Michael Croner - Obvious Teen (voice)
- Michael Croner - Chad (voice)
- Sandy Martin - Dorothy (voice)
- Piotr Michael - Major Threat (voice)
- Piotr Michael - Major Threat / Jeff (voice)
- Piotr Michael - Ms. Myrtle (voice)
- Blake Bertrand - Jamie (voice)
- James Adomian - Glutteus Maximus (voice)
- Andy Bean - Orbble Wright (voice)
- Seth Morris - Neckbeard (voice)
- Dee Bradley Baker - Bittles (voice)
- Daran Norris - Mittens (voice)
- Craig McCracken - Destructor's Sock (voice)
- Andy Bean
Edie McClurg hace el papel de Trudi (voice).
Jack McBrayer interpreta a Wander (voice) en la serie.
April Winchell interpreta a Sylvia (voice) en la serie.
Keith Ferguson interpreta a Lord Hater (voice) en la serie.
Tom Kenny interpreta a Peepers (voice) en la serie.
Noël Well interpreta a Dominator (voice) en la serie.
Capítulo disponible en las siguientes plataformas:
