Seeing he was the strongest of the robots he stole, and Mega Man had some trouble with Guts Man's "back" when he felt over him, Wily decided to mass-produce Guts Man, but the copies where destroyed by Mega Man before their activation. Wily collected the remains of the copies to create a large-sized Guts Man, but was only able to build half and replaced the legs by tank threads, naming him either Guts Tank or Guts-Dozer (Wily calls him by both names, and hasn't decided which one is better) and placing it on guard in his castle in Mega Man 2. Wily also uses Guts Man in Mega Man: The Power Battle and Mega Man 2: The Power Fighters, and in Mega Man 7 he got a replica from a museum and modified it into Guts Man G.In Super Adventure Rockman, Proto Man defeated Bubble Man or Heat Man (depending of the player's choices), and Guts Man takes the weapon of the defeated robot to use. After some tries, he notices he can't copy weapons and gives it to Mega Man, saying he defeated the robot in a mighty fight.
In Mega Man: Battle & Chase, Guts Man enter the competition to buy
root beer Energy Tanks. If the player win the competition with him, he will buy several of them and sing to commemorate, but people throw objects on him because of his bad voice and he falls over the beer Tanks, destroying all of them with his back.
Guts Man's powerful smash technique gives fear to Mega Man, and other robots try to imitate this technique, some of them being Stone Man and Concrete Man, but for unknown reasons, it's more effective when used by Guts Man. The technique is used even in the future by other robots like Flame Mammoth and Gravity Antonion.