Snake Man is a intelligent and shrewd but tenacious robot master. His build is humanoid with arms, legs and a human head, but he has a helmet designed with a snake motif and a forked tongue. He enjoys actively hunting and cornering his opponents like a snake. Hes cautious, but can be spiteful if wronged. He enjoys the company of Toad Man, and has a hatred of slugs. He can shoot a snake-like missile called Search Snake out of his buster.

A sneaky, snake-like Robot Master

Crash Man is an honest and destructive Robot Master, who is quite adamant about his purpose to destroy and blow things up. He can have quite the explosive temper at times, especially when provoked. He was created by Dr. Wily using both Bomb Man and Guts Man's blueprints. He has drills for hands, from which he can shoot out Crash Bombs.

A open-hearted and destructive Robot Master 

Cold Man has a carefree attitude, but he is slow-witted, being a bit slow when it comes to thinking. He was originally a refrigerator used to preserve prehistoric D.N.A. in Dr. Light's laboratory before being modified into a guard robot by King. Cold Man attacks by using spiked Ice Walls that he creates by opening the freezer in his body. He can also cause areas to freeze from a distance.