A Pup Named Scooby-Doo (1988–1991)
The newspaper Wheeler reads is in The National Exaggerator
A flashback scene to the 'gang's childhood is used, much like how the first movie had a reference to the Scooby and Scrappy show.
Flashback to Velma's childhood utilizes the character designs from the series.
Clips are shown.
Mentioned as a Scooby Doo show, intro clip shown.
The series is referenced and clips are shown