This is the origin story Mewtwo deserved, not a corporate retcon. You watch a creature designed in a lab wake up to consciousness and immediately understand it has no place in the world that made it, no purpose beyond what others decided for it. The special doesn't waste time on sentiment, it shows you exactly why Mewtwo becomes what it becomes, and you can't argue with the logic.
A genetically engineered Pokémon awakens in a lab with no memory of its creation, only the burning awareness that it exists as an artificial being. Mewtwo begins to question everything: who made it, why it was made, what purpose it serves in a world where natural Pokémon roam free. Isolated and powerful beyond measure, the creature grapples with a fundamental crisis of identity while pursuing answers about its own origins. As Mewtwo grows stronger and more conscious, it becomes clear that its creators have plans for it that conflict with its newfound sense of self. The special traces the psychological and physical journey of a being caught between being a tool and becoming something autonomous, between rage at its circumstances and the possibility of genuine autonomy. Through flashbacks and present-day events, we witness how Mewtwo transforms from a confused clone into the formidable force it will become, driven by a desire to understand its place in the world and escape the control of those who birthed it.