UFO

UFO is a family of viruses from the Mega Man Battle Network series. Although they never directly attack, they do steal the target's chips during the battle by charging into it. They never appear alone.

RedUFO
 RedUFOs are orange and brown. When charging, it becomes pink and red.

BlueUFO
 BlueUFO s are light-blue and dark-blue. When charging, it becomes pink and blue.

GreenUFO
 GreenUFO s are green and dark-green. When charging, it becomes light-green and green.