Doraemon (2005) Episode 175 Eng Sub

As they admire the moon, Doraemon sees a slip of paper hanging on the silver grass and finds out Nobita's wish: to become smarter. Turns out Nobita has been teased by his classmates again so Doraemon consoles him by saying that the stars will help Nobita. To impress Nobita, he gives him a Celestial Globe and a Celestial Telescope so he can look outside the universe. As they explore the universe, they somehow find a planet that looks exactly like Earth, except that it (along with Japan) appears in a reverse direction. Doraemon and Nobita gather that a reversed world exists and, believing that their parallel counterparts exist as well, they decide to go there by using a spaceship to go through the Celestial Globe.