Tonton Streaming Darkwing Duck (1991) S1E30 - Ghoul of My Dreams

Morgana is using sleep sand to rob the citizens of St. Canard while they sleepwalk. When Darkwing steps in to set things right, he ends up in dreamland. Nodoff, controller of dreamland and supplier of Morgana's sleep sand wants the entire city to snooze, and will see to it that no one gets in his way.