Celebi

Celebi is a Psychic, Grass-type Mythical Pokémon from the Johto region. It does not evolve into or from any other Pokémon. It was initially available to Pokémon GO Fest 2018 attendees only, but released worldwide a month later.

Trivia

 * On July and July  2018, Pokémon GO Fest attendees had the opportunity to catch Celebi as part of a Special Research quest.
 * On August, 2018, Celebi became publicly available with the launch of a new Special Research task series – A Ripple in Time.
 * Its maximum capture CP is 1,399.
 * Celebi always breaks free the first two balls and is caught by the third Poké Ball. Leaving encounter can reset this.