Im having mixed feelings i want it so that its in my pokedex and junk but i will probably never use it
yeah i just looked up stuff and here is something i found on bulbapedia about mewthree
A common example of a well-known fake Pokémon is Mewthree. It appears commonly in fake
cheats and fan fiction.
Rumors of Mewthree's existence within the
Pokémon games have circulated since the
first generation. Many fake methods were created, that were often impossible to perform or resulted in the player deleting their save file. These stories have led to a number of
hack games focusing on this unofficial Pokémon. The most notable of these is
Pokémon Chaos Black, in which Mewthree can
evolve into another fake Pokémon, Mewthree X.
Mewthree was also one of the names given to the silhouette of
Lucario early after its release on many internet forums because it appeared strikingly similar to Mewtwo.
Although it was a fake Pokémon, it was given an official mention in
Mewtwo Strikes Back, where the scientists responsible for creating
Mewtwo, commenting on the success of its creation, decided to start making Mewthree. However, the plans never got beyond this due to Mewtwo's destruction of the lab on
New Island.
so it wont disrupt storyline in the show and stuff i guess