METAL SLUG ANTHOLOGY

The boss of this level is a giant mechanical crab like tank that is on the left side of the screen and moves towards you as the screen scrolls to the right destroying the wooden walkway as it goes. At the beginning of the fight, it shoots out flaming cannonballs that fire out and then drop down on top of you wherever you are standing. Just move back and forth to avoid them while firing at the boss nonstop. Once you hit it enough, the top of the cannons will change and start shooting out shells at you the drop quickly at your location so make sure to move quickly to avoid them. Just keep firing away and it should fall pretty quickly.