Arei's Mirror ~ Way to Virgin Space (1985)

It has been thirteen years since the Androids began their killing rampage and Son Gohan is the only person fighting back. He takes Bulma's son Trunks as a student and even gives his own life to save Trunks's. Now Trunks must figure out a way to change this apocalyptic future

As Nobita, Gian, Shizuka, and Suneo are making their own space movie, a fleeing bug-sized alien president makes his way to Earth, and needs the help of the kids and Doraemon to stop an oppressive dictatorship threatening his democracy.

Sewashi and Doraemon find themselves way back in time and meet Nobita. It is up to Doraemon to take care of Nobita or else he will not return to the present.

On a future Earth, war between the Kingdom of Honneamise and its rival, The Republic, is inevitable. As evolving technology creates new ways to wage war, a small group seeks to propel mankind into space in their world’s first spaceflight program. For astronaut candidate Shirotsugh Lhadatt, it’s a personal odyssey as he grows from an aimless young man into a leader willing to put everything on the line in order to move the human race forward and away from the brink of Armageddon.

Doraemon and its friends open a hole in the time and they're travel to the Country of Mayana, a lost Mayan civilization in the jungle.

While struggling to make friends after his parents’ divorce, Koyomi Takasaki meets Kazune Takigawa, but apparently, they already have. Kazune reveals that she’s from World Line 85, an alternate universe in which she and Koyomi are lovers. But in a reality where moving between dimensions is natural, could Koyomi be the one from another world?

Doraemon went missing for 3 days. But it turns out later that he went to the 22nd century to buy a mystery galactic express train ticket whose destination is a secret until the passengers arrive there and see for themselves.

During summer vacation Nobita picks up a small rocket containing Papi, a palm-sized alien president escaping rebels on his home planet Pirika.

Doraemon and his friends travel to ancient Japan where they meet Kukuru. When Kukuru tells them that his tribe has been enslaved by Gigazombie, Doraemon decides to help him.

Koyomi Hidaka and Shiori Sato meet at his father’s research center and begin to fall in love, but so do their parents, who eventually marry. To avoid becoming stepsiblings, they decide to run away to a parallel universe. Traveling between dimensions is common in their world, but not without repercussions. Does a universe exist for the young couple, and what will it cost them to find it?