Review of Recess: All Growed Down

It's like about 3/5 of this movie is compilation of the episodes from the series (lazily shown in flashbacks): "The Legend of Big Kid", "Wild Child", and "The Kindergarten Derby". Then comes the finale: the movie shows the whole Recess gang as kindergarteners, including, in "Wild Child", Gus Griswald. This retrons Gus' earlier introduction as a new student at school, by showing that when new kindergartener Gus wreaks havoc and causing the other Recess gang kindergarteners to rebel against Miss Finster and kindergartener Randall. Gus is later sent to another, out of sate school and soon forgets his Recess friends, and they in turn, forget Gus, viewing him as a new student when he appears in second episode: "The New Kid". This is some plot hole.