Yesterday, I went to Galloping Ghost, the world's biggest arcade, and stumbled upon an absolute gem of a game. NINJA BASEBALL BATMAN. This game is just fucking amazing and oozing with creativity, it's easily the best beat'em up I've played from that era. The graphics and controls are great, the levels are great and unique, the enemy variety is off the charts; you're fighting furniture, playing cards, and slot machines at certain points. The bosses are also amazing, there's a ghost buffalo you fight that's made up of various objects and throws refrigerators at you. There's a slot machine boss where you see the slots in the background and can see the next thing that he's gonna throw out at you (kinda like how Tetris shows you the next block). The Angry Video Game Nerd's video below is like the perfect video to describe how amazing and insane the game is.
Apparently only 43 of the arcade machines made it to the US and I guess I got to play on one of them, pretty cool.