"Hello, my friend," Giovanni smiled wickedly, "It's been quite some time since we last met."
"Yes," Mewtwo responded, "And for a reason."
"Oh, don't be so cold. After all, I made you who you are today."
"Is that what you think?" Mewtwo growled, "You think you made me like this? No, sir. This is all my own doing."
"You need to get out of this cave. And I need a favor."
"What makes you think I would ever do anything for you?"
"You see," Giovanni paced back and forth, occasionally glancing at Mewtwo, "Team Rocket has been perfecting the creation of a certain item. And we've finally found the perfect way to make them. Now, with this item, I am certain you will help me… because you won't have much of a choice."
Giovanni pulled a master ball from his pocket and held it in his hand, "This is it. The Master Ball. It catches any Pokémon without fail. And now, it will catch you."
Giovanni sent out an Omanyte and a Vulpix, which awaited his orders.
"Omanyte, I want you to use Protect so Mewtwo can't hurt us. Vulpix use Fire Spin so he can't get away."
Omanyte created a force field around Giovanni's team as Vulpix threw fire at Mewtwo. As it was was about to hit him, he created a sheild around himself. The flame bounced off of it and hit Omanyte's force field. After bouncing between the two for a moment, the flame died down.
"Damn, you're difficult!" Giovanni shouted, throwing the Master Ball. Mewtwo knocked it aside with his arm and walked toward Giovanni.
"How could you have taught me if you can't so much as touch me?" Mewtwo asked bitterly, "It seems that your perfect Pokeball isn't quite as perfect as you thought."
"Impossible…" Giovanni shuddered. As Mewtwo turned around to leave, Giovanni seized the opportunity, grabbing the Master Ball from the ground and throwing it again. Mewtwo turned around in shock and tried to duck out of the way, but it was two late. The Master Ball hit him in the ribs before jolting open and capturing him.
Giovanni grabbed the ball and held it, laughing, "Finally. I have you."