You made it to the Hoenn Elite Four and after defeating Sidney, you made it to Phoebe which is a very massive girl that yet her giant size, she's able to move with ease... maybe it's her ghosts lifting her up. You walk up to Phoene who's waiting for you with her Duskclops next to her.

Phoebe: Hello, trainer! I'm Phoebe, the ghost type specialist. Just be ready that I won't be holding back!