Creepschool

Creepschool is a Swedish, French and Canadian animated series by Alphanim, Cinar, Happy Life and France 3 about four kids who find themselves at a spooky boarding school. The basic concept was created by Torbjörn Jansson, which was then substantially re-worked and developed by the co-head-writers Kristina Mansfeld and Per Carlsson into the series it is today. They also wrote all the storylines. Creepschool has been compared to Gravedale High.

Sweet as Chocolate (Episode 18)
Janice finds a device that hypnotizes the person it's being used on to lose their short term memory and implant a new one. She uses it on Victoria to make her clean. Later Josh uses it on Victoria's parents to maker them forget about the monsters.