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...

Chibi Maruko chan is the nickname of a sweetly obnoxious 9-year-old girl. She tricks her grandfather, ponders for hours over how to spend her allowance, and hates sitting next to ugly boys. She talks, feels and lives just as real kids do. As the second term commences, Maruko and her classmates return to their small groups. Maruko’s group includes two naughty boys and Maruko is forced to be one of their subordinates. She seems to face a lot of pressure at school. As the school’s athletic meet approaches, all the classmates are busy exercising. Maruko is no exception, although her laziness means that she is late sometimes. Maruko realizes that the two boys rival each other in everything they do, and that their friendship is deep and strong. (Source: AnimeNfo)

An original anime advertising Urawa City in Saitama, Japan.

In a world where Pokémon live and communicate with each other, there are mythical treasures known as the Time Gears that regulate the flow of time in their respective areas. If one is removed from its resting place, time will freeze in that area, so even evil Pokémon do not dare to steal them. But recently, anomalies in time have been appearing throughout the land, causing the appearance of Mystery Dungeons and violent Pokémon. Pokémon exploration teams have been formed to explore these Mystery Dungeons, arrest the violent Pokémon, and help maintain the peace. It turns out that the anomalies in time have not been caused by the recent disappearance of the Time Gears, but by Temporal Tower slowly falling apart and Dialga corrupting into Dark Dialga. The newly infamous thief Juptile had stolen the Time Gears in order to take them to Temporal Tower and stop its deterioration. The Pokémon exploration team Team Pokédans—which consists of Hikozaru and a once-human Pochama—must team up with Juptile to go to the Phantom Land where Temporal Tower is located. If the trio fails, Temporal Tower will completely collapse, leaving the whole world frozen in time forever...