Wrestling Killer
The episode starts with Nobita and Gian being almost late for school and running into each other. An angry Gian then knocks Nobita down, causing him to be late. Doraemon tries to aid Nobita with a Wrestling Killer tool. At first, Nobita mistakes it for a gun, but later understand how it works and uses it to knock Gian down. Later Suneo tricks him and he sets the tool to knock Suneo down, but accidentally caused it to turn against him. He then wastes ¥100 trying to stop the tool. The episode ends with Nobita falling down the stairs.
Aired 06/04/1979EP 5 - Wrestling Killer

Doraemon
Nobi Nobita is a 4th-grade boy in Tokyo. One day, a round, blue cat-style robot (minus ears) pops up in his desk drawer. Nobita's great-great-grandson (or something) lives in the 22nd Century, but thanks to Nobita's mistakes, the entire family is living in poverty. To rectify this, Nobita's descendent is sent Doraemon back to the past, to help prevent Nobita from making mistakes. Of course this is a difficult task since Nobita is the weakest and least intelligent child in his class. Doraemon does, however, have a 4-dimensional pocket on his front, which contains cool gadgets from the future. With these toys, Doraemon will try to help Nobita. Unfortunately, Nobita also has the bad habit of misusing Doraemon's gadgets and landing himself in yet more trouble?
(Source: AnimeNfo)