Guest Stars Jeff Bennett voices Choose Goose Steve Little voices Peppermint Butler Tom Kenny voices Ice King Maria Bamford voices Mother Worm Maria Bamford voices Chocoberry Maria Bamford voices Margaret David Bradley voices Old Finn Andy Daly voices Wyatt Dee Bradley Baker voices Snow Golem Dee Bradley Baker voices Waffle Cone Trolls Pendleton Ward voices Lumpy Space Princess Ron Perlman voices The Lich Isabelle Fuhrman voices Shoko Aryan Simhadri voices Tiffany Steve Little voices Gate Guardian Steve Little voices Turtle Princess Jill Talley voices Maja the Sky Witch Ron Lynch voices Mr. Pig Cole Sanchez voices Goblin Chris Fleming voices New Death Thomas Herpich voices Mr. Fox Polly Lou Livingston voices Tree Trunks Tom Scharpling voices Three Eyed Bird Corinne Kempa voices Life Tom Scharpling voices Jermaine Kent Osborne voices Joshua Co Starring John DiMaggio voices Additional Voices Hynden Walch voices Additional Voices Jeremy Shada voices Additional Voices Niki Hyun Yang voices Additional Voices Cole Sanchez voices Additional Voices Maria Bamford voices Additional Voices Steve Little voices Additional Voices Kent Osborne voices Additional Voices Tom Scharpling voices Additional Voices Chris Fleming voices Additional Voices