Throw the entire run-time of the show different puppets are used for the same scene. While in one shot a puppet is used with sticks in their arms for arm movements, in the next shot the sticks are gone since the arms of the puppeteers are moving the arms.
Sportacus' reactions to the sugar meltdown, which he gets causally during the show, e.g. when eating a sugar apple, is different from episode to episode. In some episodes he can't move and the other characters have to help him getting the Sportscandy (aka fruit) into his mouth but in other cases he is able to move his arm to grab it himself.
The exposure of Robbie Rotten being in disguises differs from episode to episode. While in one episode it is enough to take off the fake mustache, in others he is only exposed when his hat is removed.