S0E69 · Battle! Cat-Model Robots vs. Dog-Model Robots (2010)

It's the birthday of the cat-shaped robots, and Dorami and Sewashi are searching a present for Doraemon in the 22nd century. But during a chain of gas attacks on the cat robots under a scheme to replace them with dog robots, Dorami is wrongfully taken away, so Sewashi goes to the dog robot factory to protest against the decision. Back in the 21st century, Nobita gets a new robot companion, Wonderful, who watches over him as he does his homework. A group of breakaway cat robots led by Pawaemon take Doraemon into hiding, but when the latter accidentally causes the others to get sent to scrap, he is left on his own as Nobita goes back to the future to save Doraemon and all the cat robots.