The Grumple

"Grumple-ty, Grumple-ty Groo!"

- 's unlock message

 is a character that was released on Christmas Eve 2013. Players can enjoy a heart-warming, rhyming children's story about the murderous Grumple with the quest How Mr. Simpson Stole Christmas.

It returned on November 29, 2017 during A Rigellian Christmas 2017 Promotion as a possible prize in the Winter Wonderland Mystery Box. He later returned  on December 5, 2018 during A Simpsons Christmas Special 2018 Event as a possible prize in the same mystery box.

About
 played a character that threatened to steal all of the Holiday cheer of the Winter Holidays in the Krusty’s Kristmas on Ice show. When a fight broke out between the basket ball team and the show skaters (because the preparations for the upcoming game were ruining the show) Homer took matters to his own hands and fought the Grumple, demanding that he return the Holiday cheer.

Trivia

 * From Season 18, Episode 9 “Kill Gil, Volumes I & II”.
 * and his quest are parodies of Dr. Seuss' How the Grinch Stole Christmas.
 * The Every Man's Dream Promotional update gave a new 4h job of his own at Calmwood Mental Hospital.
 * This made the first character to have a permanent job there.