Unown

Unown is a Psychic-type Pokémon from the Johto region. It does not evolve into or from any other Pokémon. Unown is the rarest Pokémon in the game.

Forms
There are a total of 28 unique forms of Unown in the game.

Regular forms= Shiny forms=

Availability

 * Initially, there were 26 unique forms of Unown available in Pokémon GO, one for each letter of the alphabet.
 * Exclamation mark Unown was firstly released in June, 2018, during the E3, and question mark Unown was firstly released in August, 2018, during the Pokémon GO Fest 2018. These two forms appear only in events.
 * Shiny Unown is only available in events.
 * The first shiny Unown are G and O, released in Pokémon GO Fest 2020.
 * Shiny A, L, R, T and U Unown were released in Enigma Week.
 * The first shiny Unown are G and O, released in Pokémon GO Fest 2020.
 * Shiny A, L, R, T and U Unown were released in Enigma Week.

Regional Unown events
In general, Unown is extremely rare all around the world, but there are certain regional events, such as Pokémon GO Safari Zone, during which spawnrate of certain Unown forms were higher. These more often spawning forms of Unown spell a word related to the event. This happened already during following events:

Form switches sprites
Sprites for form switches in the Pokédex.

Trivia

 * Considerably, Unown is the most highly prized possession in the game making it a huge stepping stone for players. It is because Unown often spawns in inaccessible areas, making it very hard to find. Only the most dedicated players would find this Pokémon.
 * Exclamation and question mark Unown forms are counted in unique Unown caught in medals, making it possible to obtain the gold medal without completing the alphabet.
 * Sprite of Unown N was updated on August, 2019, possibly making it less confusing with Unown Z.