He talked to you about being big and having so much power is something that shouldn't be abused, yadda yadda yadda, you spaced off. You were too busy looking at the Groudon's ass. You liked how it looked. It was round, shiny like ruby, and looked about as hard as a ruby. Ypu started getting horny, which then triggered your growth.
"Being a powerful pokemon capable of changing the world is amazing, but you mustn't let that get to your head, because-" Groudon was cut off. You grabbed his ass, which cut him off. His ass was just they way you thought it was, hard and round.
He turned around, "What, what're you doing?! " He said surprised and worried. You lick your lips and said, "Digging for gold." Your dick, fully erect, goes into his ass as you start fucking him.
He gasped, it felt hard, harder than any other rock he punched, chew, created, or used as a sex toy.
You push your dick in and out as your horniness takes over, you felt as his insides, which were as hard as diamonds, open up as you used your dick to have sex with the legendary pokemon. This was amazing, not only were you big and horny but you were fucking something big that was the legendary. Not only that, but you were slowly growing, inch by inch you grew, your Rock type slut reached your chin. You didn't feel like a legendary, you are a legendary.
The Groudon who was the victim in this Pikachu's sex, was feeling