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.
Dora the explorer Donald duck Dog catcher Dale Daisy Dark wing duck Dopey Doc Doug Disney Bear Drizella Darby Dug
Dick Dastardly
Olivier B. Bommel
eeyore the donkey from winney the pooh Elvis - there was some recent cartoon about a kid called Elvis
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
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 cartoon character starting with A is Apu.
Underdog?
Dumbo the elephant
Dick Dastardly
abner Alley Oop
Alice from Alice in wonderland
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"
Bugs Bunny
Rajah the tiger from Aladdin.