Uncle Grandpa's Incredible Journey Quick clips of false moments from the show's hilarious past and future. Details Casts Title Uncle Grandpa's Incredible Journey Release Date 2015-07-09 Runtime 00 Hours 03 Minutes Genres Animation Comedy Adventure Production Companies Unknown Production Countries United States of America Eric Bauza... Belly Bag (voice)... Peter Browngardt... Uncle Grandpa (voice)... Adam Devine... Pizza Steve (voice)... Grey DeLisle... Woman (voice)... Tom Kenny... Tiny Miracle (voice)... Kevin Michael Richardson... Mr. Gus / Narrator (voice...