A newly developed Kingfisher inspired robot. It usually flies over the water surface, but as it finds Sonic and Tails underwater, it will dart down at them. — Description, Sonic The Hedgehog 4: Episode II website
Zoomer badniks are based off Kingfisher birds, but have a similar appearance to that of Hummingbirds. Zoomers are mostly aqua blue with yellow torsos. They also have rocket-like objects on the bottom of their bodies.
In Sonic the Hedgehog 4: Episode II, Zoomers are only found in Sylvania Castle Zone. In gameplay, they fly in stationary positions above the local water surfaces. When the playable characters are coming towards this Badnik however, it will launch itself downward into a mighty dive until it hits the ground.
The player can perform both Spin Jump or Spin Attack to defeat a Zoomer, although running past them fast makes them relatively harmless.
The attack pattern of a Zoomer is a reference to the Kingfisher's technique of capturing prey.