Five years ago, you were going about your regular life, but one day, it seemed as if you had awoken in a different universe because all the Pokémon were anthropomorphic and had their own lives.

After travelling through the Illex Forest, you locate a small shrine in a clearing. Earlier in the day, you were given a strange ball by a woman and feel it shaking in your pocket. You take it out, and suddenly, the Mythical Pokémon, Celebi appears.