Mew is a Psychic type Pokémon.
It is not known to evolve into or from any other Pokémon.
Mew is a pink, bipedal Pokémon with mammalian features. Its snout is short and wide, and it has triangular ears and large, blue eyes. It has short arms with three-fingered paws, large hind legs and feet with oval markings on the soles, and a long, thin tail ending in an ovoid tip. Its fur is so fine and thin, it can only be seen under a microscope. Mew is said to have the DNA of every single Pokémon contained within its body, and as such is able to learn any attack.
Mew is notable for its unique ability to learn every Technical Machine, Hidden Machine, and Move Tutor move (except those exclusive to a particular Pokémon or group of Pokémon, such as Draco Meteor and Secret Sword).
It has a unique relationship with Mewtwo due to its Mewtwo's origins as a clone.
Mew is said to possess the genetic composition of all Pokémon. It is capable of making itself invisible at will, so it entirely avoids notice even if it approaches people.
Locations / How to obtain
How to encounter it:
While having Mewtwo as the lead of your party, talk to the sailor closest to the truck in vermilion's docks, Mew will appear and the sailor will give you an Old Sea Map, you can use that to travel to Faraway Island where you will find Mew.