Mommy Fiercest
Mommy Fiercest
Series The Grim Adventures of Billy & Mandy
Season 5
Production code 518
Writer Brett Varon
Broadcast information
Cartoon Network US Premiere August 12, 2005
Paired with The Taking Tree
Chronological information
Guess What’s Coming to Dinner?
The Taking Tree

Mommy Fiercest is the 18th episode from season 5 of The Grim Adventures of Billy & Mandy.


As Gladys is in bathroom, she fashions herself by putting 'crows wiping cream' to wipe off crows feet in her face. But that doesn't work.Grim wants to go to the bathroom, but Gladys doesn't let him until the crows feet wipe off her face. So, Grim, in anger, changed Gladys into a child. This wiped the crows feet off her face. So, she went to Billy and gave him bread. Mandy says that she doesn't know her. Billy names Gladys as "Corn". As they go to a movie, Gladys says that Billy shouldn't go to the movie "Exploding Penguins III: Total Annihilation" and go only to the "Sunshine Boy". 

Back at Billy's house, Grim is in bathroom, but Harold wants to go. Harold takes Grim's sycthe, calling it a 'Magic stick thingy', the scythe turned Harold into a small child. At last, Harold comes to the cinema hall, They two fall in 'love' and Harold and Gladys get married.


  • Story and Storyboard by: Brett Varon
  • Directed by: Russell Calabrese, Sue Perrotto
  • Art direction: Rae McCarson

Triva This is the episode where Grim is not seen talking to Billy and Mandy.