The Real Ghostbusters (1986)

S1E7 Mr. Sandman, Dream Me a Dream

The Sandman believes that a lengthy slumber of five centuries could put an end to humanity's conflicts. However, his magical sleep dust inadvertently brings dreams into reality, leading to chaos for the Ghostbusters! As they confront this unexpected challenge, they must find a way to contain the dream manifestations before the world descends into further turmoil.