Walk Me Thru Super Metroid Part 6
2Phantoon Boss Fight
This cyclic Spector has drained the ship of all its power and must be defeated in order to restore power. Here's how
He'll warp in before floating around the screen. He'll be semi-transparent for most of the battle so you won't be able to hit him with anything until he becomes fully solid. Phantoon will open his performance by dropping large blue plasma flames around the screen. He'll be firing these flames out all the time, you can either avoid them until they disappear or blast them with your Beam weapon to extinguish them.
After floating around for a while Phantoon will open his eye and vanish. If you're quick you can hit him while the eye's open before he disappears, try to score a hit with a Super Missile to add an extra punch. Phantoon will continue to drop flames while invisible, at this point get a Super Missile ready to fire. As soon as Phantoon appears his eye will be open, starting straight at you.
He'll also become solid so now it's time to fire a Super Missile at him. Be careful as when he appears a row of flames will descend from the ceiling. Once you hit Phantoon he'll disappear and reappear at the top of the screen. From here he'll fire several more blue flames that travel down in a circular path across the room, first from his right side, then his left. He'll repeat this for a while before going back to hovering around the room dropping flames.
A good way to avoid the circular-moving flames is to stand below Phantoon and to one side, fire away straight up and hopefully your shots will destroy the flames before they get too close. Another great trick is to fire up the Charge Beam - hold the charge - and somersault jump through the flames as they travel across the screen to harmlessly pass straight through them. Yet another method - and by far the easiest - is to simply activate the Morphing Ball, roll to the right corner of the chamber and wait for the first wave to strike. After the flames harmlessly pass by, roll over to the opposite corner to avoid the next wave. Keep this up until the barrage ends.
Wait until Phantoon becomes solid again before firing (he'll become solid after dropping out flames while he's invisible), and you shouldn't have much trouble beating him. You'll know once he's dead as he'll stop moving and flash for a few seconds before exploding and performing a flashy warp-out self-destruct.