[Dist is willing to provide deets, thankfully.]

Are you familiar with the shrine in Ilex Forest? Apparently it's for the legendary Pokemon Celebi, which is known to travel through time. Then, in Kanto, there is a Pokemon known as Mewtwo, which was apparently created as a replica of Mew.

[He's especially intrigued by Mewtwo, but he doesn't elaborate why, because he doesn't tell anyone about his history with cloning.]