Doraemon: Nobita's Wannyan Space-Time Legend

Nobita went to a world of animals through the "Wherever Gas", the substance to let you travel anywhere, same as the "Wherever Door" Doraemon uses. They came across with Chippo, a boy who looks like a dog and very adventurous. A group called Numiges plans on taking over the animal planet. Doraemon and friends plan to stop them with the animal's help.

Nobita has been having a weird dream about a boy named Roppel and his strange companion Chami traveling in space. By a twist of fate, he met them in person where it turns out that they are real and that they were being pursued in space, causing their space vehicle to malfunction, connecting the space vehicle itself with Nobita's room. They journeyed to Roppel's planet and amidst their enjoyment, Nobita and Doraemon pledged to help Roppel's planet free from their oppressors.

Nobita finds an stray dog and brings him home, little does hi knows that the dog is actually a prince in his homeland, a world appart deep in the african "Smokers Forest" were the dogs evolved and have their own empire, so he and his friends take on a journey to take back the young prince to his homeland but when they get there things have changed...

While Nobita is sleeping, he suddenly feels the floor is trembling, like there would be an earthquake in his room. A little rabbit from an alternate universe named Chamii opens the door between the dimensions using a hammer and gets inside Nobita's room through the floor. Nobita waks up and Doraemon hears somebody steals food from the fridge in the kitchen. It is Chamii, who gets caught by Doraemon and Nobita. She shows them the passageway through Nobita's floor into the spaceship. After they enter the spaceship, they see the Koya Koya Planet. they meet a boy named Roppuru...