Of course, one reason behindScooby-Doos continued popularity has to do with the strength of its main villains.
In contrast to mostScooby-Doobaddies, then, the Phantom Virus appears as a wholly different kind of antagonist.
Charlie the Funland Robot
Charlie the Funland Robot is a bit of an anomaly within the larger continuity ofScooby-Doo.

Scooby-Doo, Where Are You!
In spite of his haywire programming, its hard not to look at Charlie without growing a tad uneasy.
The Ghost Clown
Whats scarier than a ghost?
How about a ghost that also happens to be a clown?

Captain Cutlers Ghost
Theres just something about Captain Cutlers Ghost that appeals to all of our collective imaginations.
If thats not evidence of their clear popularity, we dont know what is.

Scooby-Doo and the Cyber Chase

Scooby-Doo, Where Are You!

Scooby-Doo, Where Are You!

Scooby-Doo 2: Monsters Unleashed

Scooby-Doo, Where Are You!

Scooby-Doo, Where Are You!

Scooby-Doo, Where Are You!