The movie that no one remembers

Here is an old "Little Nemo: Adventures in Slumberland" movie trailer that was recorded in 1992.

This animated feature film was actually originally released in Japan on July 15, 1989. Three years later it was re-released in the US on August 21, 1992. Here is the trailer for the US re-release.

Basically, Little Nemo is "a young explorer who must save a noble king, outmatch a mighty monster, and win the heart of a princess!" Although it was considered a flop in Japan, it did somewhat well in the US.