There's an animated short done as an extra for the Aloha, Scooby-Doo! DVD, called An Evening with the Scooby-Doo Gang. I don't consider it to be canon for the following reasons.
- It's done in a tongue-in-the-cheek style, which takes their celebrity to areas that has never been done outside of this (comics would make them mini-celebrities, but nothing ever seems to come out of that for some reason. But that's another story).
- Scrappy is brought up, which does actually provide a much needed, albeit subtle, hint of what happened to him (which is, even the animated counterparts got fed up with him), but the fact that he is brought up still creates more problems than solving them as he's never been brought up outside of that. He seems to just not exist anymore (although he did make a cameo in plush form in Goblin King).
- Fred treats the Morgan Moonscar zombie from Zombie Island as if he was a guy in mask.
- As far as I know it's only been on DVD and has never been on TV. Now, even with Those Meddling Kids segments on Cartoon Network, I wouldn't consider that to be canon because that just takes too many liberties that can't be considered canon. Unlike Meddling, which looked low budget, Evening matches the look of the then-current WNSD style, making it genuinely connected (and for Warner Bros. Animation it is for all intents and purposes), and to an obvious degree, it is, just not the way I would like for it to be connected. Perhaps if it had been aired on TV, I would consider it being canon, but it still leaves me with the first three issues again.
- It also includes a connection to Laff-a-Lympics, by Scooby being familar with Yogi. Although, considering that the canon of Laff-a-Lympics, itself, is questionable at best, it doesn't stand for much.
I just wanted to let you all know how I stand with this short feature.
(I definitely don't consider those shorts where Scooby and Shaggy get advice from Kid Y to be canon.)