Gravity Beetle (Gravity Beetbood in Japanese version) is one of the 8 Maverick bosses from Mega Man X3.
Gravity Beetle was a Maverick Hunter in the Special 17th unit directly under Sigma, much like his brother Boomer Kuwanger. While he never joined Sigma's revolt, he later resigned from his job after Boomer kuwanger was defeated by X. When he learned of Dr. Doppler's uprising, he willingly joined his army to take revenge against X for his brother's death, making his base on a large aircraft carrier stationed at Doppler Town.
Gravity Beetle fights by shooting his Gravity Well, small spheres of energy which bounce around the arena, while doing small jumps and sometimes attempting to charge with his horn. After losing most of his energy, he will create a large black hole on the top of the screen, reducing the fighting area and affecting the room's gravity. His weakness is the Ray Splasher.