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I'm assuming she's an attacking type due to her effort towards becoming a Pokemon, rather than simply becoming better at what she is which would indicate a defensive type. She also is lithe, which indicates speed- thus, a sweeper.
So, depending on her stats, whether they lean more to physical or special, I would suggest...
High ATK: Play Rough, Petal Blizzard, Blaze Kick, Earthquake; EV train Attack and Speed
High SPA: Moonblast, Energy Ball, Heat Wave, Earth Power; EV train Attack and Speed
Holding an Expert Belt, due to the type coverage. If she encounters a type not covered by her moveset, the STAB of the Fairy moves should be enough to get her foe put down.
