Alvin and the Chipmunks are cartoon characters. They begin with the letter A.
Marge and Maggie out of 'The Simpsons' begin with the letter "M"...
Yogi Bear and Yosemite Sam are cartoon characters. They begin with the letter Y
If you are referring to the cartoon characters from the Simpsons, the answer is Itchy, the cartoon mouse.
Violet Gray is a character in the comic strip Peanuts. Her name begins with the letter V.
Zelda
Fairly OddParents
Underdog
animator
Underdog
Alvin
* Naruto
Krazy Kat