Bit and Byte were created by Dr. Doppler to destroy X as he posed a threat to his own plans. Bit and Byte then received an upgrade from Dr. Doppler, creating a much more powerful robot.......
The Godkar Machine was formed when Dr. Doppler gave Bit and Byte an upgrade. They fused together to form this. X overcame and destroyed it.
Repliforce scientists developed Colonel as half of the perfect fighting machine. Colonel, the fighter, and his sister Iris, the peaceful Reploid. The scientists wanted to make them one Reploid but it was impossible. He was known for his stubborness, and because of it caused the battle. When The Sky Lagoon fell, Colonel was discovered near it. He refused to unarm when he was taken into questioning, but didn't, which would've cleared his name. Because of this, the Repliforce was deemed as Mavericks, and they were defeated, along with Colonel defending the Final Weapon.
Double was hired out of nowhere and brought to the Hunter Base to help X, just like Alia. He would give out important information and helpful hints, so X had no reason to think Double was up to something. When X was at the Space Port, Double turned into Jello Man and killed some of the 17th Unit. X and Jello Man fought at the Final Weapon, and when Jello Man died he revealed he had been a spy all along.
Douglas is the mechanic at the Hunter Base, helping X and Zero with weapon upgrades and such. In MMX5, he built the Enigma and the Space Shuttle with the parts X and Zero collected, and if it weren't for him, Eurasia would've hit Earth and everyone would be dead.
Dr. Doppler was the first ever Reploid Scientist, but he soon got infected with the Sigma Virus. He tried to create an anti-virus, but failed. When people learned he had the virus, his forces distracted the hunters and Mavericks attacked the Hunter Base. He hired Bit and Byte, almost like hitmen, to assasinate X. He also rebuilt Vile, but he tried to kill X for his own purposes. X conquered them all, and the Doppler as well. Doppler revealed everything to X, and even gave him a working anti-virus that save X's life.
Dynam was hired by Sigma to help spread the Sigma Virus all over Earth. After Eurasia was taken over, he had to stop both X and Zero from destroying the space colony. Ever since he knew he wasn't invincible, he's been constantly running away from battles, but is always willing to fight them again (in X6, anyway)
Gamma
The current leader of the Gamma Unit that was wiped out by the "red maverick" (zero) a long time ago.
Even More......
Hosted by www.Geocities.ws

1