Ronald Grump is the main villain of the 1994 25th anniversary TV special "Sesame Street All Star 25th Birthday: Stars and Street Forever!". He is described as rude, angry, mean, mad and quite ruthless.
In the special, he wants to demolish Sesame Street to realize his plans for The Grump Tower. The Sesame Street residents inform Grump of the many wonderful moments in the neighborhood that have happened over the years, but none of it changes his mind. "If there’s one thing I despise," Grump says, "it's cheap sentiment. Hugs, kiddie television, cute, furry animals..."
He ultimately abandons his plans to build Grump Tower when he realizes that Oscar's trash can is on city property, and Oscar refuses to move, inadvertently saving Sesame Street.
- His name and appearance are quite based on Donald Trump.
- He is portrayed by Joe Pesci.
- He is the first Sesame Street character to be a villain the second being Huxley.