Mew is a pink feline-like creature that resembles a Fetus or a Jerboa in some respects. It has a short, fat tail, big hind legs, and short arms with three-fingered paws. Mew also has small triangular ears and blue eyes. Mew is said to have the genetic material of every single Pokémon contained within its body. It is theorized that it may be the ancestor of all Pokémon. It's DNA is said to contain the genetic codes of all the Pokémon, so it can use all different kinds of techniques. Apparently, it appears only to those people who are pure of heart and have a strong desire to see it. Mew is also considered cute from a lot of people.
Shiny Mew used to be available through donations in earlier stages of development in PTD 1, but was removed due to complaints from other users.
When using Reflect Type, Mew keeps the type reflected until it reflects another Pokémon's type or until it learns a new move; in the later case, it's type resets back to Psychic.
During one update in PTD 1, all Shiny Mews were removed from everyone's accounts due to the amount that were created by cheating. Users with proof of purchase were able to receive a replacement.
Mew can learn the most TMs of any Pokémon, every single one of them. It is tied for this honor with Missingno.
During one update Mew were represented with a Bulbasaur sprite in the team selection and in any level in the team.
A new bug occurs with a Normal Mew. It seems that if you use Transform and then learn a move by Level-Up (even after de-transforming), the transformed Pokémon's name will be displayed on the message instead of Mew's.
Mew, along with Snorlax, Lapras, and Mewtwo, have the lowest chance of any other Pokémon in PTD to appear catchable in the wild, percentage chance of this being 0.1%.
Shiny Mew in PTD is shiny locked to appear in the wild, it was gonna be but it would make people mad who spent 20 SnD Coins on one, therefore the only ways to get a Shiny Mew in PTD is to spend 20 SnD Coins or trade.