If you're looking for manga similar to Doraemon: Obaa-chan no Omoide, you might like these titles.
A baseball team comprised of futuristic robot cats and a human make their way towards becoming a great team.
WALL-E is a trash compactor robot — the last one of his kind! — and every day for hundreds of years he's faithfully cleaned and organized the millions of tons of trash left behind on Earth by humans. But his routine is flipped upside down when he finds a tiny green plant, the first new sign of life for centuries! When the sleek new robot EVE shows up to take the proof of life back to humanity, WALL-E falls head over wheels in love and eagerly follows her across the galaxy into a whole new adventure!
Haruka, the only known survivor of a cataclysmic global war, has taken refuge with a diverse group of sentient robots with distinct personalities. They attempt to survive in the desolate post-war environment; however their supplies are limited and the military robots are still active and hostile. Haruka remains optimistic that other humans may have survived the war, but their persistent search efforts have failed to locate any survivors. Is she destined to live her life without any human contact?
Signal, a robot companion built for Nobuhiko, is attacked by Pulse, one the its creator's previous prototypes. Reprogrammed by Dr. Otoi's mysterious rival, Pulse is loaded down with weapons and sent on a mission by Otoi: steal the most recent robot technology, and obliterate anything that gets in his way.
It's said that Thomas Edison stuffed all of his knowledge into his final invention, a screw. Presently, said screw is buried inside the head of Matsunaka Spica, a high-school girl!!! When Matsunaka Spica's thoughts rise to a high enough level, she can create amazing inventions that would normally be impossible to construct!
When a spacetime warp sends the Autobots and Decepticons to the Japan of another dimension, they get involved in Mazinger Z's fight against Dr. Hell and Baron Ashura.
When schoolgirl Rushiha is suddenly attached by a humanoid robot, a guardian robot named Faust appears out of the blue to rescue her! And why does he insist on staying on as her permanent bodyguard? The answers to these questions lead the unlikely pair on a quest to rescue her scientist father from the clutches of his own creations!