Heavy and Bomb were Robotnik's mechanics, but supposedly defected from the Badnik Horde in order to assist Knuckles and the Chaotix in their operations against Dr. Eggman. Whatever Heavy and Bomb's true intentions, Knuckles and his allies-which also included Mighty the Armadillo-succeeded in defeating Eggman's forces. (VG: KC)
Heavy is thought to have defected from Eggman's forces due to opposing the doctor's will, indicating sentience and a sense of right and wrong.
- Heavy and his partner originated from the video game Knuckles Chaotix.
- Heavy and Bomb were known as the "Mechanix" in the Chaotix American game manual.