Mewtwo's face began to droop slightly as he went over the details of the operation that created him in his head. He had been thorough in his destruction of the facility that created him, even after rebuilding it for his own machinations he had been careful to remove any trace of it afterward. But he couldn't be certain that there weren't backups or duplicates of the research that created him.

"I am the first to survive the cloning process. ...And I made sure that the facility that created me would create no other clones. There are a handful of clones of other Pokemon - my own creations - that I care for in my world, but as far as I know, I am the only one of my species. And that Mew I encountered was the only one of it's species. I cannot be certain that the research did not survive, but considering the psionic abilities I possess I find it difficult to think that another of my kind would be able to hide itself from me, or I from it."