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 — 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 . None of them is currently available.
First two of them – Phione and Manaphy are duo of Sea Guardians .
Following three Mythical Pokémon aren't related to each other. Shaymin has two forms.
Other Meltan and Melmetal are Mythical Pokémon introduced with Pokémon: Let’s Go, Pikachu! and Pokémon: Let’s Go, Eevee! .
Availability
Pokémon
Transferable?
Tradable?
Deployable to Gym?
Obtain method
Mew
No
No
No
Special Research - A Mythical Discovery
Celebi
No
No
No
Special Research - GO Fest 2018/A Ripple in Time
Jirachi
No
No
No
Special Research - GO Fest 2019
Deoxys
Yes
No
No
EX Raid Battle
Meltan
Yes
Yes
Yes
Special Research - Let's Go, MeltanMystery Box
Melmetal
Yes
Yes
Yes
Evolved from Meltan
See also 
