A Pup Named Scooby-Doo (1988 - 1989): Dog Gone Scooby

Dejected because no one will play with him one rainy day, Scooby runs away from home. A sad Shaggy convinces the kids to search for his missing friend, but someone evidently wants Scooby for his own purposes. With Scooby lost in a rough part of town, the gang races against time and a rival to rescue the errant canine.