He looks identical to Scooby in every way. Also, like Velma, he wears glasses.
Like Velma, he shares a unique interest in being highly intellegent, and handling computers. He's was known and proven to be very highly intellegent.
A Pup Named Scooby-Doo
Skippy attended the family reunion at the Knittingham Puppy Farm. As a puppy, he could very well relate to Velma sharing a common interest in computers and being highly intellegent. (Curse of the Collar)
(to Velma) "My new computer should prove to be highly efficient."
(Velma) "Jinkies, Skippy! That's what I was going to say."