As a child, this reviewer did consider 'The New Scooby Doo Movies' as one of the better Scooby Doo shows. Still do think that, but also like it less than as a child because the problems are more noticeable, notably the guest stars and villains faring better than others.
Some of the guest stars are very entertaining, such as Sonny and Cher, Batman and Robin, Don Knotts, Sandy Duncan, Harlem Globetrotters, Laurel and Hardy and especially The Addams Family, others such as Cass Elliot and Speed Buggy not as memorable. A good deal of the villains are enjoyable and make an impression, though none are as iconic as the best villains in 'Scooby So Where are You' (still the best of the incarnations), others suffer from over-obvious real identities and not always believable motivations.
"The Ghastly Ghost Town" is a decent start for the show, but is not a great one, definitely could have been better. Some of the animation has some crude moments and noticeable goofs and the villains are not particularly memorable and the identities of the culprits are not surprising by any stretch of the imagination (a case of it could only have been them). Had mixed feelings on the story and The Three Stooges.
Story-wise, there are plenty of laughs, great atmosphere (especially with a fantastically creepy setting that one wishes was matched by better villains) and genuine sense of danger. It also does very well in maintaining the atmospheric and enjoyably silly spirit of 'Scooby Doo Where are You'. However, it does run out of steam and ideas towards the end, with the exception of the inventive final trap, with perhaps the plot feeling a bit too stretched, and the pacing loses tightness and drags at times. It was interesting in seeing The Three Stooges and while they're likable and have some amusing moments, they're never hilarious and they have been much funnier before.
On the other hand, other parts of the animation boasts some nice colour, smooth drawing and the characters look fine on the whole. The setting is wonderfully evoked in the visuals, actually feeling deserted and haunted. The music is haunting and energetic, with a catchy new theme tune if not as iconic as 'Scooby Doo Where are You's' theme tune. "The Ghastly Ghost Town" is smartly and humorously written, especially with Shaggy and Scooby, and there are some great moments here so it is a shame that it wasn't as consistent as it could have been.
As always, Shaggy and Scooby's friendship charms, amuses and affects and there is great chemistry within the gang. There are no problems to be had with Fred and Daphne, nor with Velma even if she is somewhat underused. The voice acting is fine, top notch even from Don Messick and Casey Kasem.
In summary, decent but not great. 7/10 Bethany Cox