You let her win

Although your Pokemon are indeed much stronger than her one Pokemon, you decide to let her defeat your Pokemon so that she can experience her first victory. Before you take out your wallet to give her some money, she stops you.

"Wait," she says to you, "I know in the Trainer handbook, it says the winner can get money from the loser, but I know you wanted to fuck me since why else would you be with me." She motions you to get on her couch.

You sit on her couch and she sits along with you. She then pushes you so that you are laying on the couch, and then she takes off of her skirt and panties while you take off your pants. Excited by your hard cock, she reluctantly grabs it and guides it to her virgin pussy. Once in, she bounces it as fast as she can, her B-cup breasts bouncing along with her.

"Ohh yeah, do you like my tight little pussy?" she asks naughtily as she bounces up down on your cock. Words were not needed to respond since you are enjoying the view, having her ride your cock. In the end, it seems that it didn't really matter who won.

You realize that you are about to cum, and so you take it out of her pussy. She takes off her buttoned shift and her bra to expose her breasts then says to you, "Cum on my tits.", which you do so. She grasps some of the cum and licks it with her tongue.

After cleaning herself up and getting the clothes back on, she runs to one of the cabinets in her kitchen/living room and gives some sort of Potion to each of your Pokemon.

"My mom and dad bought tons of these Ultimate Restore Potions, just in case Rockruff got injured," she explains to you as she uses one on her Rockruff, "You better go before my parents come back." She kisses your cheek before you leave the house, as if to thank you for letting her win.