Possibly one of the best ending for Doraemon (Xiao Ding Dang). Personally I think this is one of the best ending for evergreen series but the publishers did not think so, forcing the mangka withdraw the doujinshi from publication.
However it becomes an enduring legend of the lore that is well beloved by millions of kids across Asia for many decades. Here is the scanned and translated version for non Japanese Doraemon fans.
Enjoy.
The link