Aaahh!!! Real Monsters - Season 1, Episode 13: Simon Strikes Back/The Ickis Box
The show follows three adolescent monsters, Krumm, Ickis and Oblina, in training who attended school under a city dump. Every day they enter a new exciting adventure trying to scare the people inside their school. The beginning of this season is with a Halloween night turning to a disaster because of the three monsters.