At a certain point during Islets, you'll be tasked with gathering Ship Parts - with these, you can upgrade your ship and add a weapon to it, allowing you to break those pesky blocks apart and access new areas near Sky City.
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This unlocks two new bosses fought in the sky, just like Sky Pirate - only this time, you have a weapon. One of these bosses is GrappleBot, a large, mechanical ball of doom that spews projectiles at you like there's no tomorrow. You'll need some premier dodging skills if you want to succeed at this fight.
GrappleBot only has three attacks and doesn't have an enrage phase at all, but that doesn't stop it from being a challenging encounter.
This fight may very well be your first with a weapon in the sky. As there is no downside to keeping the fire button held down at all times, do so - you want to be constantly firing in these fights. Other tips for success include:
Remember, your hitbox is the red circle within your ship, not the ship itself! Make sure you keep an eye on that and don't play too cautiously.
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