Heck, the Ghoul School girls get a Crowning Moment of Awesome simply for being nice enough girls that Shaggy is willing to hang around monsters for a year without screaming his head off.
Revolta is completely neutralized as a threat in two moves, and it's thanks to Tanis and Elsa. Tanis uses her bandages as a "lasso" to take Revolta's magic wand away from her, and Elsa then throws the wand into the fire, destroying it.
Sibella was the only ghoul who almost got away from from the spiderbats, and she was strong enough to nearly manage to shake off the hypnosis. Even Revolta notices it.