Pokemon: Mewtwo - Kakusei e no Prologue

ミュウツー ~覚醒かくせいへの序章じょしょー[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.