My friend and I watched a movie sometime around 1992/3 and I remember the cover had a boy on his bike (which we decided was a good enough reason to rent it). The plot was about the kid being transported to a dream-like world that was made up of (it seemed like) bits of other movies. The villain was trying to steal the colour from the world, or something.

I’m reasonably sure the title was the boy’s name followed by adventure, or excellent adventure, or amazing adventure.

This has been niggling at me for a VERY long time. Any ideas?

EDIT: The villain also sang a song about stealing the colour!