It's unconey (uncanny)

One time I defeated the ghost gym (Pokemon Pearl) thanks to foresight. Fantina was down to only her Gengar when she defeated my Prinplup, then proceeding to easily sweep my other Pokemon. Only my ~lvl 8 pidgey was left that I kept only to fly. She couldn't hit me, but my pidgey had foresight, so I slowly whittled down its HP with quick attack.