It's the next day of the con and the guys tell their friend Empty about what happened with the girls the day before. I don't know... I guess Empty was either already at the con at a panel or something, or maybe he showed up later on when the guys were already with the girls.

And yes, this is based on one of my friends and fellow hentai artist Empty Ani. We were more in touch at the time this was made so when I asked him which Pokemon girl he wanted to be paired off with he chose Karen, and so Karen it is. From what I heard, she's one of the few major characters from the games that did not make it in the cartoon.