Doraemon Robot War is a 1983 Taiwanese film produced by Wang Film Production Co., Ltd, and animated in Taiwan. There is very little information about this film, with the only information being a 31 sec video clip of the film and an advertisement for the film. However, some screenshots exist.
There are some errors in this movie, such as Doraemon's belly sack being gray instead of white.
The only clip released by now: http://web.archive.org/web/20160602174451/https://www.youtube.com/watch?v=jdgPMA2GO5c