Mythical Pokémon

Mythical Pokémon are group of rare Pokémon which can only be encountered in special means, including Special Research and EX Raid Battle. The obtain method of Mythical Pokémon is more difficult than that of Legendary Pokémon.

In core-series games, Mythical Pokémon were a group of Pokémon seen so rarely in the Pokémon world that some question their very existence.

Characteristics
Mythical Pokémon share the following characteristics:
 * Buddy Pokémon 20 km for 1 candy
 * require 100,000 Stardusts and 100 candies to unlock the second Charged Attack
 * can be filtered in Pokémon search by typing mythical
 * if transferable, an extra warning appears when trainers try to transfer them, cannot be mass transferred as well
 * if tradable, require a Special Trade, cost a large amount of Stardust even if already registered by both trainers

Kanto
The Mythical Pokémon from Kanto region is Mew.

Johto
The Mythical Pokémon from Johto region is Celebi.

Hoenn
The Mythical Pokémon from Hoenn region are Jirachi and Deoxys. The second one &mdash; Deoxys, is known for having four different forms.

Sinnoh
There are five Mythical Pokémon from Sinnoh region which are Phione, Manaphy, Darkrai, Shaymin and Arceus. Only Darkai is currently available as of 17 October 2019. First two of them – Phione and Manaphy are duo of Sea Guardians.

The Dark-type Mythical Pokémon – Darkai is the part of Lunar duo along with Legendary Pokémon – Cresselia.

There is also Grass-type Mythical Pokémon – Shaymin which has two different forms.

The last Mythical Pokémon from Sinnoh region is Arceus that is trio master of Lake Guardians and Creation Trio. It has 18-different forms corresponding to each of existing types.

Unova
There are four Mythical Pokémon from Unova region which are Victini, Keldeo, Meloetta and Genesect. Currently none of Mythical Pokémon is available in the gameplay nor have its sprites assets in the game data.

The first one – Victini is the Fire, Psychic-type Mythical Pokémon. Unlike the other Mythical Pokémon's placement in Pokédex – which is at the end of region section of Pokédex, Victini is the first Pokémon of Unova-region Pokédex, even before the Starter Pokémon of this region.

The second Mythical Pokémon of Unova region is Keldeo, which is fourth member of Legendary Pokémon group – Swords of Justice. It is currently unknown if Keldeo will have two different forms in Pokémon GO.

The other Unova-region Mythical Pokémon is Meloetta, also known for having two different forms.

The last Mythical Pokémon of Unova region is Genesect, the first and only Bug-type Mythical Pokémon who is also known for having 6 different forms.

Unknown
Meltan and Melmetal are Mythical Pokémon introduced with Pokémon: Let’s Go, Pikachu! and Pokémon: Let’s Go, Eevee!. It is currently unknown what region they belong to in Pokémon GO. This is the first Mythical Pokémon in the entire franchise to be known for evolving into another Pokémon.