The Badnik Tails is a character that appears in the Sonic the Comic series published by Fleetway Editions. It was a Badnik built by Doctor Robotnik to resemble Tails and to absorb Tails as its organic battery.
Robotnik built the Badnik Tails after Tails escaped Robotnik's previous attempts to make Tails a part of his badnik army. In this instance, the Badnik Tails did not manage to absorb Tails. It was presumably destroyed along with the other nearby badniks (such as the Badnik Sonic, the Badnik Ruff, and the Badnik Stripes) when Sonic forced Robotnik to free the captives.