Headcanon

Species: Mew
Designation: New Specie Pokemon
Height: 0.4 m (1’04”)
Weight:4.0 kg (8.8 lbs)
Ability: Synchronize
Status: Legendary
Age: Undefined
Level 100
Mew can learn any TM or HM move, in addition to its moveset. It can also learn any move that a move tutor offers. This in combination with her unlimited moveset makes her a formidable foe, though she rarely fights, considering herself to be above such things.
[Headcanon is still under construction.]
Personality: She believes herself superior to all non-Legendary Pokemon, and especially humans. This causes her to act quite arrogant when speaking with others, and considers any amount of time spent with most of those she considers lower than herself to be a gift not taken lightly.
[She can turn into a human, and will appear as such unless a roleplayer sends a message to this account specifying they want to interact with her as a Pokemon. I will keep track of who wants her to be a Pokemon when they interact with her.]
Appearance as a human: She is only able to take on one human form, one that she has created herself. However, she does not take on the form of an actual human; more like she developed the ability to transform into a very humanlike shape after many, many years of working on this disguise. She is still actually a Pokemon, just an odd-looking one, which means that any Pokeball thrown at her would still have effect on her. Also, there is no possibility that she could transform into the shape of another human; she was only able to achieve this form through decades of work.
Her human form is that of a young woman, about twenty years of age. She is fairly thin and short, about 5’0. She has plain brown hair which she often keeps in a ponytail for convenience, and her eyes are the same startling baby blue that she has in her natural form. Her face has a youthful appearance, without any blemishes; despite this, her nose is a bit too large, and her mouth curves downward a little so her neutral expression looks serious or disapproving. Overall, she looks like a smart, serious young woman.
The only thing off about her appearance is her clothes. She actually doesn’t wear any clothes; her clothing is just a layer of skin. If anyone were to examine her closely enough, they would pick up on this oddity; her ‘clothes’ barely flap in the wind, for instance, and she wears the same thing from day to day. Her ‘clothing’ looks like a simple long-sleeved white shirt, and a pair of white pants that do have pockets in them. She also wears white sneakers, with no socks; her shoes are also part of her body.
Autobiography:
I am not cruel, nor kind. I am merely neutral.
I merely am. Humans often have a hard time understanding this. They expect me to take a stand when injustice is dealt. But my role is to be the observer, nothing more.
You must understand. I am old, human. Older than you can imagine. I have lived since the great Creator breathed life into me, and from me He fashioned all the lifeforms on this dear Earth.
…or, you can choose not to believe my recollection of events. Perhaps the universe formed from a cosmic explosion, or whatever explanation you see fit to create. It is entirely possible that I have become so old that even my earliest memories are false.
…it does not matter. This world was created, the hows and whys are not important.
What matters are those who live in this world, and how they shape this earth through their actions.
I once turned a blind eye to how this earth was changed by one species that live on it- the humans- but all too recently, they have made the mistake of affecting me personally.
[Mew of the BFM roleplay]