When I lose a Pokemon, it's usually garbage to average mons. Here's what she has lost me so far:
Kyurem (early game w/ Dragon Rage)
Cobalion (which had Drizzle!)
Dialga (with Quiver Dance)
Current team:
Solrock: Quiver Dance, Psychic, Signal Beam, Rock Slide
Jirachi: Psychic, Zen Headbutt...