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Sebastian has mostly black fur, except for his paws and the tip of his tail, which are white. His face is also covered in white fur, although he has a black mask-like pattern around his eyes. He has blue eyes.
Sebastian is tricky and annoying, much like his owner.
The New Scooby-Doo Movies
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- Sebastian's sinister laugh is similar to Muttley, who was Dick Dastardly's dog on Wacky Races and Dastardly and Muttley in the Flying Machines. Muttley was also voiced by Messick.
- Sebastian, Alexandra, Melody, and Alexander were originally planned to appear in 1977's Laff-A-Lympics, but because of legal issues with Archie Comics at the time, were removed from the final product.