In the alternate continuity of "Treehouse of Horror VI", his spirit plots revenge on the students of Springfield Elementary after getting burned to death by their parents' actions.

In the episode "My Fair Laddy", Willie recalls his birth and how his abusive father told him he would never amount to anything in life and would be lucky if he grew up to be "garbage".

In "The Father, the Son, and the Holy Guest Star", he unleashes a giant pie of rats on the Springfield Elementary medieval festival to get revenge for being cast as the village idiot and his cruel treatment.

In "Dark Knight Court", Willie causes hundreds of eggs to be splattered at the Springfield Easter celebration out of inbred hatred for the holiday.

[5] Matt Groening later revealed that the character was based partially on Angus Crock, a kilt-wearing chef from the sketch comedy show Second City Television, who was portrayed by Dave Thomas[6] and Jimmy Finlayson, the moustachioed Scottish actor who appeared in 33 Laurel and Hardy films.

[7] A recurring joke, which was first shown in "Radio Bart", is that Groundskeeper Willie appears to have an average build with a beer belly, but upon removing his shirt he is incredibly muscular.

[9] Groundskeeper Willie's description of the French as "cheese-eating surrender monkeys"[10] from the episode "'Round Springfield" has become widely used, particularly in the run-up to the war in Iraq.

In 2009, Willie was added to the "Famous Glaswegians" webpage of Glasgow City Council, based on his line in "Simpsoncalifragilisticexpiala(Annoyed Grunt)cious".

[14][15] In Season 23 Episode 13 "The Daughter Also Rises", first aired in 2012, it was finally stated that Groundskeeper Willie is from Kirkwall in Orkney, therefore ending this dispute.

[17] Following the result of the referendum where the Scottish electorate voted to remain as part of the UK, the producers released an image of Willie now standing in front of a Union Jack flag, looking depressed with his "Aye or Die!"

tattoo replaced with a picture of the Queen and empty bottles of whisky with a newspaper featuring Former UK Prime Minister Gordon Brown, who was widely credited with giving the "No" campaign a last-minute boost.