Eiga Story Doraemon - Nobita no Shin Makai Daibouken ~Shichinin no Mahou Tsukai~

Doraemon, a cat shaped robot which came from the 22nd century in the future, goes back in time in order to help Nobita, a below average lazy kid, to make his life less miserable and improve his descendent's life. With many of Doreamon's gadgets from the future, Nobita's life will never be as the same.