Pokemon: Mewtwo - Kakusei e no Prologue
Mewtwo: Kakusei he no Prologue
Pokemon: Mewtwo - Prologue to Awakening
ミュウツー ~覚醒への序章[プロローグ]~
The original story is set before Mewtwo meets Satoshi and his friends in the upcoming film's storyline.
It will focus on Mewtwo's history, goals, and how it became the strongest Pokémon.