Jirachi

Jirachi is a Steel, Psychic-type Mythical Pokémon from the Hoenn region. It doesn't evolve into nor from any other Pokémon. It is available as a reward for Special Research Tasks.

Trivia

 * From June to June  2019, Pokémon GO Fest attendees had the opportunity to catch Jirachi as part of a series of Special Research tasks.
 * Its maximum capture CP is 0.
 * Jirachi always breaks free the first two balls and is caught by the third Poké Ball. Leaving encounter can reset this.
 * On August 20th, Jirachi  became available as a reward for the Special Research Task - A Thousand Year Slumber