One of the pokémon mansion journal states that Mewtwo’s birthday is February 6th.
Mewtwo comes before mew in the Pokedex despite being created from its modified DNA.
Mewtwo and Charizard are currently the only Pokemon with two mega evolutions.
Mewtwo’s mega evolutions are tied with mega Rayquaza for the highest base stat total of 780.
Mega Mewtwo was the first mega evolution revealed to the public and the first to appear in the anime even before mega evolution was announced at the time it was known as Mew 3 or Mewtwo’s awakened form.
Mewtwo was originally depicted as the only member of its species being a clone of Mew in the anime and manga however it is implied that multiple Mewtwo have been created.
Mewtwo was the first Pokemon seen in the English dub as it appears at the very beginning of the first dub opening.
It usually remains motionless to conserve energy so that it mainly shit’s full power in battle.
The pokémon mansion journal also implies that Mew was impregnated with the modified clone as in real-life cloning however all other depictions show mewtwo being grown using laboratory equipment.
Mewtwo is the only known Pokemon created via cloning methods.