(CP-ing from Bulbapedia)
"Well Sean, Mewtwo was created after years gene splicing and DNA engineering experiments based on Mew. It is said to have the most savage heart among all Pokémon, lack compassion, and strike fear into its enemy with cold, glowing eyes. Because it was engineered to be the ultimate in battle, it can only think of defeating its foes. It was capable of levitation, telepathy and mind control. More information is found within the Pokemon Mansion in Cinnabar Town." Oak said.
As Prof. Oak mentioned the Mansion, Zack was surprised. He never entered the Mansion, although it was a walking distance. His parents forbid it since poisonous wild Pokemon are in that mansion. "Oh, the Pokemon Mansion. I see it all the time. It's a historical site." Zack said.
"Oh, by the way Lunia. We'd probably know whose Mega Stone it resonates to in 1-2 days. Just be patient. Once the answer come up, I'll PokeNav you all." Prof. Oak said.