Older cartoon childhood fantasy movie
In the movie its like the boy is dreaming... he gets picked up by this ship and it takes him to a whole new kingdom. The king of the kingdom gives him a key, that will open every door in the kingdom, but hey must never open one bad door. He opens the bad door and evil pours out of it, like this dark stuff and consumes the land so him and his friends have to save the king and the kingdom. I can't think of the name of the movie and I really want to know because I haven't seen it in forever! Please help!
