At the beginning of the Pokémon world, the World Tree nourished all things with its original energy. However, it collapsed due to the unprecedented battle between the "Guardian Faction" (led by Ho-oh and Lugia) and the "Controller Faction" (Dark Lugia, Super Ancient Groudon, etc.). Only one "World Seed" containing the power to reshape the balance was left, which traveled through time and space and landed in Zhenxin Town in the Kanto region.
Ayang, who was born on a rainy night, has been symbiotic with the seeds of the world since birth. The seeds turned into a treasure bag called "Nitian", which contained an infinite master ball - this is not only a gift from the world tree, but also the key to reversing the unbalanced destiny. With a special mission, Ayang embarks on a journey: from challenging the youth of the Nibi Gym to understanding the true meaning of "respecting Pokémon's wishes" in the Orange Islands; from pursuing the legend of the Ho-Oh in the Johto area, revealing the secrets of the World Tree battle, to confronting the Shadow Team who attempts to seize the treasure bag and awaken the remnants of the Control Faction.
During the journey, he teamed up with the straightforward water expert Xiaoxia and the knowledgeable Pokémon observer Xiaojian. They witnessed the fall and rebirth of legendary Pokémon, and also experienced the tragic situation of ecological imbalance. Ayang gradually understood that the Infinite Master Ball was never a "conquering tool". The real power of the "defying heaven" treasure bag stems from the bond between the trainer and Pokémon, and the responsibility to protect the balance of the world. When the Shadow Team awakens Dark Lugia and attempts to recreate the disaster of the World Tree War, Ayang will use the name of the successor of the World Seed to gather the remaining efforts of the guardian faction, use bonds and courage to restart the vitality of the World Tree, and return the Pokémon world to its original intention of "symbiosis between man and nature".