Doraemon: Nobita and the Haunts of Evil (1982)

Nothing is impossible for Doraemon's magic pocket, much less when it comes to using their inventions to live the most amazing adventures. Is there a place where no man has gone before? The robot cat magic door leads to our friends at the center of Africa, just until Smokers Forest, a forest covered with a thick fog that prevents satellites take pictures. Nobita and his friends decide that if there is so much to discover, is certainly there.