Metamorphia

Metamorphia is a female 'shape shifter', able to both transform herself into anything she wanted and change parts of her body independly of the rest of it, such as turning her hand into an anvil or blade. Metamorphia was created by Dr. Robotnik and idolised & loved him (her room in #52 has self-drawn pictures of him on the wall), desperate to please him and have her feelings reciprocated. She failed every attempt to destroy Sonic The Hedgehog and his freedom fighters, and when not in battle appeared to be very insecure and self-conscious.

Sonic first met Metamorphia when she, posing as a sweet bear, lured him into a trap in The Grim Zone, where Sonic thought she had perished after falling into one of the Zone's fiery pits, she in fact assumed a fire proof form and survived. Metamorphia returned in the guise of a rival green hedgehog named Cosmic, who challenged Sonic to a race, once lured away from help and the Green Hill Zone, Metamorphia revealed herself and attacked him, only to be defeated again (# 30 & 31). She would resurface pretending to be Sonic's long-lost twin Tonic, though her cover was quickly blown and she was easily defeated by the Freedom Fighters (#51 & 52).

Metamorphia's fall from grace occurred in The Cybernik Strikes Back (issues 63-67); while she was able to defeat Shortfuse the Cybernik and capture Tekno, she failed to stop them detonating a large part of the Chemical Plant Zone. As punishment, Robotnik removed her shape-shifting powers and had her turned into a Badnik. Sometime later Tails was attacked in the Grim Zone by the Badnik Metamorphia, angrily blaming Tails and the other Freedom Fighters for making her like this. Once the Badnik was destroyed and Metamorphia was free, sobbing that she had failed again, she turned her back on being evil and said that she now hated Robotnik. Suddenly Metamorphia then experienced one last final change into a sweet bear (not much different from the form she took in her first appearance) and left to live a new life (#83).

Metamorphia was one of the enemies that Robotnik, in his god-like state, resurrected to battle Sonic in Showdown (issue 130), though this was not the real Metamorphia.

Notes: Exactly what species Metamorphia was is unknown. Her final form was an anthropomorphic bear and in her debut she also resembled a bear, however after, she looked much more like an evil cat similar to Cam from B.A.R.F. Regardless, she is now a bear.