Guest Stars Pendleton Ward voices Ellis P Audrey Bennett voices Astrid John DiMaggio voices Jake Jeff Bennett voices Evil Choose Goose Jeremy Shada voices Finn Phil LaMarr voices Dog Cake Phil LaMarr voices Nightmare Cake Phil LaMarr voices Beard Guy Pendleton Ward voices Old Man Cake Pendleton Ward voices Nerdy Alien Voice Marc Maron voices Squirrel Jeremy Shada voices Coffee Guy Jeremy Shada voices Woodpecker Co Starring Sharon Horgan voices Additional Voices Maria Bamford voices Additional Voices Dee Bradley Baker voices Additional Voices Marc Maron voices Additional Voices Jeff Bennett voices Additional Voices Jim Cummings voices Additional Voices Grey DeLisle Griffin voices Additional Voices