Dorothy - Wizard of Oz (SNES)

Dick Dastardly - Wacky Races (NES/DC)

Duane - Minor character in Final Fantasy 6 (in the Mobliz village with the children)

Duncan - Sabin's karate teacher in Final Fantasy 6

Dragonair - Pokemon

Dragonite - Pokemon

Destin - Ogre Battle 64 character

Debonair - Ogre Battle & Ogre Battle 64 character

Devon - The old guy in Knight Rider (NES)