There are far too many to list here and it's doubtful you would want to read a list that long.
Your best bet is to Google Milhouse Van Houten Simpsons Wiki the list can be found there.
His first appearance was The Simpsons' debut episode, "Simpson's Roasting on an Open Fire" aired December 17, 1989.
Millhouse is Bart's friend, so he must be around 10. (cause that's how old Bart is, Lisa is 8.)
Millhouse is Bart Simpson's best friend and is in love with Lisa Simpson. He is also constantly getting into trouble which is usually started by his friend Bart.
The Mike Tyson-inspired boxer is named Drederick Tatum.
1987
Das Bus
Kirk, Luanne and Millhouse.
Millhouse is Bart's friend, so he must be around 10. (cause that's how old Bart is, Lisa is 8.)
He was one of the first characters
November 1996.
There are several. Professor Frink, Martin, Comic Book Guy, Millhouse, Wendell (the kid who's always throwing up)
September 1997 and May 1998
Ringo was the first Beatle to appear in the Simpsons (he was the first major celebrity to appear in the series) in an episode called Brush with Greatness.Paul and Linda McCartney appeared in Lisa the Vegetarian.George appeared in Homer's Barbershop Quartet.
September 1999 and May 2000.
September 1997 and May 1998
Millhouse is Bart Simpson's best friend and is in love with Lisa Simpson. He is also constantly getting into trouble which is usually started by his friend Bart.
There does not appear to be any study of historical writings regarding The Simpsons.
The Mike Tyson-inspired boxer is named Drederick Tatum.