Without knowing which character or in which episode they appeared, your question is hard to answer. If there was a new character in Season 21, most likely what happened to them is the same thing that happens to most of them. They were one shot characters and only existed in The Simpsons world for the one episode they appeared.
Poochie, a dog, was a new character briefly introduced to the 'Itchy and Scratchy Show' in the Simpsons episode: 'The Itchy and Scratchy and Poochie Show' (episode 14, season 8).
Sideshow Bob appeared in Season 26's The Simpsons Guy & Blazed & Confused.
The Simpsons is currently on hiatus and will return with a new season in September 2015.
Season 26 began on November 02nd 2014
Season 29 began on October 01st 2017.
The New Kid on the Block, Season 4
Lionel Huts was the Springfield attorney who first appeared in the second season of the TV series The Simpsons. He was incompetent and always looking for a new case.
is there going to bo a new simpsons game
Without knowing when the question was originally written, it's hard to know exactly what you're referring to as The Simpsons airs new episode from September to May, & will do so through May 2019, its 30th season.
Nothing. The new season is about to start!
he said like many times since 1st season to today season. he said many different d'oh. Ike doome in The Simpsons Movie.
Stella Bonasera, a key character on CSI: NY, was last seen leaving for a promotion in New Orleans at the end of Season 6. She was written out of the show due to actress Melina Kanakaredes's departure from the series.