I’m looking for cartoon 2D movie from 90s with creatures (there was a ram too) collecting magic stardust ( purple and shiny ) into buckets and thanks this trick, they have beautiful dreams. But there is also a Nightmare (something like black knight) riding on a black horse. He attacks them or rather their dreams and we see them in the clouds. One of the characters dreams about snakes in the nightmare.
It isn’t “Dreamstone” definitely. VHS movie or an episode. Thank you in advance. Every suggestion is good.