The Twin Bats (official name unknown) are a minor stage enemy exclusive of the NES version Strider.
Appears in Japan.
The Twin Bats are a set of mecanical bat-shaped robots that appear in Kuramoto's residence in Japan, as the only enemy in the area besides mini-boss Dragon Fiend. The Twin Bats can be found in the first room after using the transport tube, and Hiryu can't proceed further (the screen doesn't scroll) until he destroys them.
These two small robots have a simple pattern: they fly slowly in a wavy pattern starting at the middle of the room, periodically releasing a projectile below them to attack. They can easily be hit by the side, or from a distance by using one of Hiryu's long-range Tricks or the Plasma Arrow.