Scoobert "Scooby" Doo is the eponymous character in the Scooby-Doo animated television series created by the popular Hanna-Barbera franchise. Scooby-Doo is the pet and best friend of Shaggy Rogers and in many iterations, including the original series, is regarded as a unique Great Dane dog who is able to speak in broken English, unlike most other dogs in his reality. Other incarnations, such as A Pup Named Scooby-Doo, present talking dogs like Scooby as quite common.
The head of children's programming at CBS, Fred Silverman came up with the character's name from the syllables "doo-be-doo-be-doo" in Frank Sinatra's hit song "Strangers in the Night".
Different iterations of the character have been developed and expanded in the various series featuring the characters, many of them contradicting, such as the original series and recent live-action movies where Shaggy and Scooby-Doo first meet as older teenagers for the first time, contradicting the "Pup Named Scooby-Doo" animated series where they know each other from almost infancy.
In all versions of the character, Scooby-Doo and Shaggy share several personality traits, mostly being scared easily. But their friends (Velma, Daphne and Fred) encourage them to go after the costumed villains, usually with "Scooby Snacks", a biscuit-like dog treat or cookie snack (usually shaped like a bone or, in later versions of the cartoons, Scooby's dog tag), though occasionally appealing to Scooby-Doo's inherent loyalty and courage to take a more heroic stance.
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Official Site: Warner Bros.
Links: Wikipedia Scooby-Doo Characters Scooby-Doo.com