To make prey faint, VIBRAVA generates ultrasonic waves by vigorously making its two wings vibrate. This POKéMON's ultrasonic waves are so powerful, they can bring on headaches in people.
Sapphire:
VIBRAVA's wings have not yet completed the process of growing. Rather than flying long distances, they are more useful for generating ultrasonic waves by vibrating.
Fire Red:
Leaf Green:
It generates ultrasonic waves by violently flapping its wings. After making its prey faint, it melts the prey with acid.