The character tweak comes from the cartoon animated series South Park. Based on 4 young boys from Colorado, U.S, South Park is aimed at adults, with a large quantity of adult jokes, swearing and bizarre adventures.
The show Blue's Clues had a character named Blue.
On the Pokemon television show, a character is named Gary Oak. He is the rival of Ash Ketchum.
90210 has a character named Liam.
The show Entourage has a character named Sal who is also known as Turtle.
The Jeffersons
no, he is a character from a TV show named naruto.
Happy Days
The Jingles Show (or Jingles of Boofland)
Ready or Not
The Beverly Hillbillies
the Mod Squad
There is no popular television series that features a human character named Karr. However, there is a car prototyped named KARR (Knight Rider). It was a character in the tv show Knight Riders.