"Half my team or the whole thing?" she asks with interest.

Some random kiddy trainers will battle her (truncated team list) just to see how an ace handles her Pokémon, but she can usually only pull out the stops against one of the Gym Leaders - there's two she hasn't gotten to yet - or other guild members. Sooner or later she'll sweep the Elite Four, but only when she's come up empty on all the leads in Sinnoh and wants internationally-recognized cred. (You beat anybody's Champ, you are good to go, here there anywhere.)