Teenage Mutant Ninja Turtles 1989 Classic Arcade

Use Raphael and use his + combo and you'll kill him while never getting hit (Thanks To Razzleson)

or

You hide in a corner while ur friend kills the boss while making sure you dont get hit by the the flamethrower.

or

Use the Up and Down method up close and he will only melee you and shouldnt shoot fire at you unless ur far away.