Muscle Bomber Duo

Muscle Bomber Duo is a Japan-only update of Saturday Night Slam Masters. It was never ported to home consoles.

"To decide who will enter the Team Battle Royal as Number One, the "Heat Up Scramble" is held! Which team will be titled the strongest?"

Gameplay
Other than being a very minor upgrade (like some of the Street Fighter games revisions), Muscle Bomber Duo actually did feature some changes from the original game. Now, instead of walking into an opponent and automatically grabbing him, the player had to press the grapple button (previously known as the pin button) at the right moment.

The player could either play the game with three other people, or with a CPU-controlled partner against another team.