Gumball's biggest fan finds the lost episode of the show and accidentally opens a portal that connects his world to Gumball's cartoon world.. This is the first HBO Max.' animated film and first Hanna-Barbera Studios film of 2020s to be produced in 2.35:1 and the first to be rated PG by the MPAA. It is also the first The Amazing World of Gumball film to be produced in 2.35:1.. Featured in AniMat's Crazy Cartoon Cast: Wild Knuckles is in Jail (2022)