Dark Spider (not it's real name)
This boss is SOOOO easy. He just shoots beams at u and charges at u. When a portal thing appears, wait about a second or so then dash to the left or right. U do the same thing when he's going to charge at u. His beams might get a little bit faster but he's still easy. Repeat this until it's dead.
Missle Trooper (optional)
This guys the same as the other Troopers, but he's more powerful. Just shoot him, do charge shots, and missles and he'll be dead in no time.
This guy is kind of the same as the dark spider, but a little bit harder. This guy jumps around a lot. He invincible when he's about to jump, but u can shoot him when he's on the cliff. He might shoot u or he might jump back down. If he is going to shoot u, dodge (dash) it. If u get hit u will be knocked out of the light field. If u do, get back in as quick as possible. He will also charge at u. Just dash out of the way but don't go out of the light field. When u get near to killing him, everything he does will get faster, so don't use charge shots or missles, just shoot him as fast as u can!
This guy is fast! But he don't shoot u until he stops, THAT'S YOUR CHANCE TO GET HIM WITH EVEYTHING U GOT! She waits a sec before she shoots u normaly, or she uses a charge shot. If she just shoots u, hide behind one of the pillars. If she uses a charge shot, dash away when she shoots it and shoot her as much u can. After, she will start speeding around again. Sometimes she will shoot u while she's speeding around. She might dash at u too. So be ready to dash out of the way. After ur half way done, she will power up. One new trick she has is a very powerful charge shot. If u think u gonna be a chicken and hide behind the pillar, it won't work. IT BLASTS RIGHT THROUGH IT! So remember to get her with eveything u got when she stops.
*NOTE* Sometime after, metroids will escape from their cages and attack u in the rooms they were in. If one gets on to u, turn into a ball and use a bomb.
U want to save your light ammo for later. It will keep burrowing into the ground and jumping back out. Just keep shooting, use charge shots and missles on it until it's armor is off. Then keep shooting it's mouth until it comes off. When it's inhaling air, turn into a morph ball and get sucked up. Then use all 3 bombs inside it. It will grab the black ball and smash it, then it dies. Now u goin against 2 of them! Make sure when they jump from the ground, they don't land on u. Just shoot their armor, do one worm first then the other. Once it's armor is off, go for it's mouth. If u don't destroy it in time it will turn the light crystal into a dark crystal. The light field will go away. So get your Light Beam and shoot the dark crystal. It will be light crystal again. Now u have the light field. Now go for the worm again and shoot it's mouth until it's destroyed. Go into it as a ball and use all 3 bombs in it. It will grab the big black ball in the middle and smash it. Repeat this until it's dead.