FusionDex

Nidobat's large ears give it a keen sense of hearing and can also be used to emit sound. The powerful ultrasonic vibrations they emit cause people and Pokémon exposed to them to feel nauseous and unwell.

Even a robust wrestler will become dizzy and unable to stand when exposed to its 200,000-hertz ultrasonic waves. The male Nidoran has developed muscles that freely move its ears in any direction.