Zombies Ate My Neighbors and Ghoul Patrol (UP)

You can jump straight to the boss by using the following password.

R0V7

Using the Password R0V7 you can fight this boss right away with the starting weapon, 2 extra lives and a medkit, the starting weapon is pretty weak but can be fired much faster by shooting the boss while up close to it so aim to do that as much as possible, if you die you get a few seconds of invincibility where you can spam attacks right on the bosses too.

This boss has an almost static rotation where he will shoot twice, swing the chain then charge at you, the goal is to get the bulk of damage in while he's shooting, move back and get a bit of damage when he swings the chain, then slide around the left side of the arena to (try to) avoid being hit by the charge, half way through the fight he will start to throw fire at you too just do your best to avoid that, you can also see this strategy in the video below.

Ghoul Patrol - Ghost Pirate Boss - R0V7