Big Fuzz is a gigantic, skeleton-like robot who protects Red Falcon's factories. He usually makes his entrance by forcing open a large metal door and then proceeding to attack the player (these doors usually end up violently closing and beheading him at the end of the battle).
His main form of attack is to breathe a continuous stream of fire, although he can also shoot tracking laser beams from his eyes and deploy several timed bombs at once.
His main form of attack is breathing a continuous stream of fire in a clockwise direction, requiring the player to move quickly and precisely to avoid being incinerated. He can also shoot tracking laser beams from his eyes that last for a few good seconds, and also deploy several timed bombs at once. If the player is on the ground by the time the bombs count to zero, they will explode and the player will lose a life. All these attacks can be combined with each other, making the fight that much more difficult.
When defeated, the sliding door Big Fuzz forced open will close on his neck, resulting on him being beheaded.
In Contra 4, Big Fuzz will crawl through the narrow corridors of the Factory to pursue the player. It attacks with a fire breath that has to be either jumped or ducked. After taking enough damage, it chases the player and gets caught in the doors the player went through to reach it. The only way to finish it is to shoot the damaged Shoud on the side of the door to manually close it and clip off its head.
One significant change involved in the boss fight against Big Fuzz in this game is that the player cannot cling onto ceiling of the room where the battle takes place.
Big Fuzz still possesses time bomb deployment, but instead of releasing fire bombs which would force the player to hang on the ceiling to avoid getting caught in the explosion, he now releases three time bombs at their current position; all the player has to do is move away from where the bombs are laid, making their pattern easier to evade.
Big Fuzz's flame breath attack also returns, but instead of breathing a stream of fire clockwise, it breathes it left and right in an attempt to sweep and burn the player.
Just like in Contra III, Big Fuzz also launches tracking projectiles (energy balls instead of laser beams this time around) at the player from its mouth, but they are shot one at a time and can be neutralized after taking multiple shots.
When defeated, in this game Big Fuzz simply breaks down and collapses.
- Big Fuzz is based on the Snatcher, the main enemies from Konami's video game science fiction thriller Snatcher, originally released for the PC-8801 and MSX2 computers in Japan in 1988.