Board Thread:General Discussion/@comment-24744495-20140625045639/@comment-25100529-20140626081413

I'm pretty sure everything until Scooby Doo Mystery Inc. is in the same universe, canonical mistakes make you think otherwise but in one episode of What's New, Scooby Doo we found out that the gang is the same as in APNSD, and in  Aloha, Scooby Doo (which is same  univers as Whats New, Scooby-Doo) Shaggy mentions Scrappy in Extra scene which you can find on DVD, you can find it on Youtube also: https://www.youtube.com/watch?v=rCOWmQYpJvI