Gumball must face his demons and overcome an embarrassing incident from his past if he wants to finally summit the dreaded rock-climbing wall in gym class.
Guest Cast
Clive Russell
voices Additional Voices
Naoko Mori
voices Additional Voices
Kerry Shale
voices Additional Voices
Steve Furst
voices Additional Voices
Rich Fulcher
voices Additional Voices
Cast Appearances
Alkaio Thiele
voices Gumball
Hero Hunter
voices Darwin
Kinza Khan
voices Anais
Teresa Gallagher
voices Nicole
Dan Russell
voices RichardEpisode Discussion
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