Ditto

Ditto is a Normal-type Pokémon from Kanto region. It does not evolve into any other Pokémon.

Trivia

 * Ditto is only non-Legendary Pokémon from Kanto region that was not available with release of the game, as it possesses special move - Transform.
 * It appears in form of Pidgey in encounter.
 * Ditto can only transform once per battle. It will retain its first transformation for the duration of the battle.
 * Ditto cannot be seen in the map view, because it disguises itself as few the most common Pokémon. It will only reveal itself once it has been successfully captured.
 * It can disguise itself in wild as:
 * Kanto-region Pokémon: Zubat, Paras and Venonat;
 * Johto-region Pokémon: Sentret, Hoothoot, Ledyba, Yanma and Remoraid.
 * Hoenn-region Pokémon: Whismur and Gulpin.
 * Following the conclusion of September 2018 Community Day event, players reported sightings of an undiscovered Pokémon, who was later identified as Meltan, which turned into Ditto once captured.
 * Ditto used to disguise itself in wild as Pidgey, Rattata, Mankey, Gastly, Magikarp, and Zigzagoon, but after release of shiny variant of them, Ditto was not spotted disguised as them anymore.
 * Hoenn-region Pokémon: Whismur and Gulpin.
 * Following the conclusion of September 2018 Community Day event, players reported sightings of an undiscovered Pokémon, who was later identified as Meltan, which turned into Ditto once captured.
 * Ditto used to disguise itself in wild as Pidgey, Rattata, Mankey, Gastly, Magikarp, and Zigzagoon, but after release of shiny variant of them, Ditto was not spotted disguised as them anymore.