Mew

Description
Mew is a Psychic type. Mew is normally described as a pink cat-like creature, that resembles a fetus or a jerboa in some respects.. It has a long, skinny tail, big hind legs, and short arms with three-fingered paws. Mew has triangle-shaped ears and baby-blue eyes.

Mew is said to have the DNA of every single Pokemon contained within its body. It is theorized that it may be the ancestor of all Pokemon. It is the strongest pokemon in the Kanto region.

Location
Buying the "Hero Edition" of Ninja-ja will grant you 3 shiny Mew codes. It will be available as a wild Pokemon in the future.

Shiny
Shiny Mew used to be available through donations in earlier stages of development, but was removed due to complaints from other users. The only way to ever get a shiny Mew is to through trade or buying Ninja-ja for 20€ or dollars however, a normal Mew will be available later in the game.

Or adopting he with 20 S'nD coins.

Trivia

 * Mew is the only Pokemon in the game thus far that has a shiny but not a normal sprite programmed into the game.
 * If, by any way, you acquire a normal Mew, it appears as a Gyarados and you cannot use it. This is probably because Gyarados is the closest in numerical order to Mew, and that the game has not yet been designed to cope with regular Mew.
 * In the Pokemon Center, Mew appears to be in it's normal sprite instead of it's shiny sprite, despite not having one in-game yet.