Toraemon has Appeared

Nobita's friends have been pranked using gadgets, and they think Doraemon is the culprit. Nobita confronts Doraemon, who insists he didn't do it. Doraemon himself is then pranked with a flying dorayaki, and he falls into a trap set up by Toraemon, another robot cat like him who enjoys pranks and was responsible for pranking Nobita's friends earlier.

Toraemon leaves and begins to peddle gadgets around the streets. He meets Nobita's dad, but when he refuses to buy from him, he proceeds to hit him with a plastic hammer. Nobita and Doraemon come and the latter tries to use a gadget to stop Toraemon, but Toraemon uses a magnet to attract all of Doraemon's gadgets. Doraemon ties him up with the Infinity Lasso and subdues him, along with the added weight of the gadgets. Nobita and Dad want to beat up Toraemon, but Doraemon stops them. Toraemon seems to become friendly and goes back to the future in peace, but not before he placed signs on Doraemon and Nobita's backs that read ばか ("Baka") or idiot in Japanese.