Prologue
After saving their world from the return of the Shadow Games, Yugi and his friends were once again able to return to their normal lives. But their short period of peace was interrupted when they were called upon by the Great Goddess Millennia. They were brought to an enchanted garden in the heart of a valley that was its own world; a paradise separate from their own world and the other worlds they were about to be sent to.
Their mission to covet the Cobalt Star shards began when Millennia sent her heroes to the world of Pokémon; a place they dared only dreamed about. The heroes didn't forget the mission of their journey, but they were also able to enjoy the thrill of being Pokémon trainers too.
They traveled through the Johto Region, meeting many friends and acquiring many Pokémon companions. Emily was also competing for a chance to take part in the Johto league, winning many gym badges.
In the middle of their journey, the heroes met up with their old friend Lugia, a legendary Pokémon who once helped them to save their world. When Lugia knew of their mission, he brought his old friends to the Pokémon sovereign, Arceus, who was guarding the Cobalt Star shard they were sent to acquire. After explaining the aftermath of the Battle of the Gods and why the world was separated into many worlds, Arceus accepted Emily's challenge for the Cobalt Star shard. Emily did not want Arceus' sacrifice to be the result of her victory, so she conceded the battle, knowing it meant trapping herself and her friends in the world of Pokémon forever. But Arceus saw the good in Emily's heart and understood her reasons and therefore declared her the victor of their battle.
After winning the Cobalt Star shard from Arceus, the heroes continued their journey through the Johto Region. When they came to the Johto league, to their surprise, they met up with Max, who was sent on behalf of the Dark Lord for the same purpose. After facing off against many fierce trainers, Max and Emily were pitted against each other. It was a tough struggle, but Emily managed to come out victorious. Although she didn't win the Johto league, she still had fun and an incredible adventure.
With their adventures in the Johto Region behind them, Yugi and his friends were ready to return home to their world. But when they came to the Secret Garden, they faced a tight situation. There was more than one door, but no one knew which was the door to home because the doors looked exactly the same. Max suggested that the heroes should split up into teams. Yugi, Joey, and Kaiba passed through one door. To their delight, they returned home to their world. But to their worry, they realized that Max and Emily had passed through a door to a new world.
What strange new world will the girls end up in? This is how their adventure unfolds.