Dr. Robotnik nad first appeared in Knuckels's Chaotix. Heavy is a clunky silver robot , boxing gloves hands. Bomb is a small red bomb with two legs and arms. They claimed to have escaped the clutches of Dr. Robotnik and helps the Chaotix in there missions and never seen again. They were next seen in Mobotropolis were Geoffrey St. John has saw there ability's: Heavy can tap into any database , Bomb can explode her recruited them in His Majesty's Secret Service. In one of there missions they were reprogrammed as sleeper agents and Bomb let out a gas that weakend the rest of the Secret Service Bomb later created hundreds of copies of himeslf that surround Knothole helding the Royal family hostage, but Sonic smashed thorugh Heavy, while Rotor used and Emp Genorator the De activated that de activated the Bombs. New models were built to assinate Mina Mongoose but were quickly defeated.