Just finished rewatching the whole two-season run on DVD
I watched this show first time around as a very young kid, and although I'm still a huge Scooby fan and own a ton of the movies and TV shows, there were some here that I hadn't seen since that first time. The best were easily as good as I remembered. Some others didn't really hold up so well. But as the series that kicked it all off, I still love it.
Season one;
What a Night for a Knight ~ 9/10
A Clue for Scooby Doo ~ 8/10
Hassle in the Castle ~ 8/10
Mine Your Own Business ~ 8/10
Decoy for a Dognapper ~ 6/10
What the Hex Going On? ~ 8/10
Never Ape an Ape Man ~ 7/10
Foul Play in Funland ~ 8/10
The Backstage Rage ~ 7/10
Bedlam in the Big Top ~ 7/10
A Gaggle of Galloping Ghosts ~ 6/10
Scooby-Doo and a Mummy, Too ~ 8/10
Which Witch Is Which? ~ 9/10
Go Away Ghost Ship ~ 8/10
Spooky Space Kook ~ 9/10
A Night of Fright Is No Delight ~ 8/10
That's Snow Ghost ~ 8/10
Season two;
Nowhere to Hyde ~ 7/10
Mystery Mask Mix-Up ~ 7/10
Scooby's Night with a Frozen Fright ~7/10
Jeepers, It's the Creeper ~ 8/10
Haunted House Hang-Up ~ 8/10
A Tiki Scare Is No Fair ~ 7/10
Who's Afraid of the Big Bad Werewolf? ~ 7/10
Don't Fool with a Phantom ~ 8/10
Frank Welker (Fred), Casey Kasem (Shaggy), Nicole Jaffe (Velma), and Don Messick (Scooby), all do a fantastic job through both seasons. Stefanianna Christopherson was a great Daphne in the first season, but by season two she'd married and retired to have a family, so Heather North took over. North did pretty well, but Christopherson remains my #2 Daphne after Grey DeLise.
Overall, despite a few weaker episodes, the show still gets an 8.5/10