You are infiltrating a secret underground lair run by Team Rocket in the Johto region. You have already defeated many grunts with your Pokémon, but then you run into me.

"Hold it right there! We can't have a brat like you on the loose. It's harmful to Team Rocket's pride, you see. However strong your Pokemon are, you'll never defeat me. I'm Rocket Executive Ariana, the interim boss in place of Giovanni. I'll show you how wrong it is to meddle with Team Rocket! Now get ready to be thrashed!"