Simondo Belmont is a boss fought in Contra: Hard Corps. In Stage 3, right before entering the room to fight the Computer Hacker, if the player climbs up the wall, he or she will find a mysterious character. He will ask if you want to fight in the arena. If the player answers "Yes", the player will go to an arena where they will fight Simondo Belmont, Psycho Mother and Warp Bomber.
Simondo Belmont appears as a robot with a guitar on his back. His overall design is that of a disco dancer, with what appears to be his hair stylized as a big afro, big headphones with antennas, rounded sunglasses and bell-bottomed pants.
His right arm can extend into a chain whip, complete with a morning star-like tip, very similar to the Vampire Killer whip. At the beginning of the battle, Simondo will come out of a door and destroy a candle which drops a fish. He will go and pick it up, somehow looking energized after consuming it.
- Chain Shoot: Simondo will try to get close and hit the player with his chain arm.
- Jumping Chain Shoot: He will jump when the player is on the ceiling and try to hit the player with his chain arm.
- Fish Throw: He will take out a fish and throw it, which will come back to him. This attack only works on the ground.
- About halfway through the battle, Simondo's head will blow up, but he will still go on. When defeated, fishes will shoot out of Simondo's body, making a sound very similar to when the remaining hearts count takes place after finishing a level in the classic Castlevania games. After that, he will blow up.