Mary Van Der Deth
Kot maryvanderdeth
Gender: Female
Species: Human
Hair color: Grey
Eye color: Black
Personal Information
  Kick Buttowski
Gunther Magnuson
Emo Kid
Jackie Wackerman
Unnamed late husband
Terrance (spider)
Production Information
First Appearance:
  "Kick or Treat"
Last Appearance:
  "Kick or Treat" (speaking)

Snow Problem”(appearance)

Voiced by:
Debbie Reynolds

Mary Van Der Deth is an old lady who makes her only appearance in "Kick or Treat". In this episode, it's revealed that she turned her mansion into one big haunted house due to her love of Hallowe'en and that her late husband made their fortune by selling the scariest Hallowe'en decorations in Mellowbrook. Kick and Gunther throw an awesome Halloween party at her mansion after becoming the first kids to trick or treat there and discovering that she has bought candy year after year hoping that kids would finally visit her (this has accumulated into a huge pile of candy which she gives to Kick and Gunther).