Dennis the Menace, Dancer (one of Santa's reindeer), Dick Tracy, Donald Duck, Dopey (Snow White & the 7 dwarfs), Dorothy (the Wizard of Oz), Dr. Doolittle, Dracula, Dudley Do Right (Bullwinkle comic strip) and Darby Shaw (The Pelican Brief by John Grisham) are fictional characters. They begin with the letter D.
Dick Dastardly
Olivier B. Bommel
eeyore the donkey from winney the pooh Elvis - there was some recent cartoon about a kid called Elvis
The cartoon that has a wolf as a character is called Ralph Wolf and Sam Sheepdog. This cartoon is an animated series that is a part of Warner Brothers.
A Chartoon Character that starts with the letter D is Donald Duck and Daisy Duck from Disney Daffy from Looney Tunes Warner Bros and this might count The cartoon Movie Ice Age Diego
A cartoon character starting with A is Apu.
Underdog?
Dick Dastardly
Dumbo the elephant
Alice from Alice in wonderland
abner Alley Oop
yogi bear! :D
a cartoon character starting with the letter M could be mickey mouse , minnie mouse
Kenny from South Park
itchy from "itchy and skratchy"
elmer fudd
Bugs Bunny