Mew

Mew was created by Arceus in the dawn of time, shortly after Dialga, Palkia, and Giratina were birthed. Mew is responsible for creating all pokémon life on earth.

Much of Mew's past is unknown, but she did create a name for herself amongst both pokémon and humankind as the Uncapturable Mew. Roughly one hundred years before the events in Stun, Mew performed the first future sight and from it was able to create a prophecy in regards to Stun and the prevention of the end of the world by Tenebrae's hand.

Mew was first introduced in Chapter 1 of Stun and was the first character to mentor Stun until he bathed in the Pool of Psychic Energy and defeated Mew in battle.

Mewtwo was created using the DNA from one of Mew's eyelashes, and the two have since become close friends.

During the events of Stun II, Mew ended up being captured for the first time by a Team Rocket grunt using a darkball. After being captured, Team Rocket experimented on Mew somewhat to make her more powerful, and the experimentation resulted in Mew acquiring blue triangle-like markings on her body, and also increasing her powers.