Bronto Burt are common flying enemies in the Kirby series. They buzz through the sky on fly like wings, attempting to get in Kirby's way. Often, they fly in set patterns such as vertically up and down, or horizontally in a zig-zag pattern, although some will sit on the ground waiting for the player to approach before taking to the air to chase them. Sometimes they are seen carrying things with their feet, such as other enemies or bombs and will attempt to drop these on Kirby's head when he approaches.
Super Smash Bros. series
In Super Smash Bros. Brawl, Bronto Burt appears as a collectible trophy for the Kirby series and a sticker, depicting his Kirby 64 artwork. Bronto Burt's sticker increases a fighter's body and spin attacks by 4. Bronto Burt was also intended to appear as an enemy in Subspace Emissary alongside other Kirby foes, but was cut. Presumably it would have appeared in the Lake Shore and Cave stages since at that point in the story, the main characters are pursuing King Dedede to his castle.
Bronto Burt finally appear as enemies in the Smash Run mode for the 3DS version of Super Smash Bros. for Nintendo 3DS/Wii U. Mimicking their behavior in the Kirby series, they are fairly weak enemies that fly through the air and usually spawn in flocks. Some will chase after fighters and perform a spin attack that slices their opponents with their wings.