Metroid Prime

First, get a metroid latched onto you. Next, lay a bomb and position yourself next to a wall, so that when the metroid is dislodged, it gets stuck in the wall. Wait a couple seconds, and the metroid should simply explode. This is particularly useful against the Fission Metroids, especially when low on Power bombs.

Their are two phases to defeating Metroid Prime. To get to Metroid Prime, first you have to climb to the top of impact crater. Once you're in the top room, Metroid Prime is resting their. To defeat him you must look at the color of its body. If it is yellow, take out your power beam. If it is purple, take out your wave beam. If it is white, take out your Ice beam. If it is red, take out your red beam. Metroid Prime usually starts out with a yellow body, so take out your power beam. Just keep shooting it. The way it will attack you is it will shoot missels, (dodge them by moving to the side and pressing b), a beam, (move to the side to dodge the beam), giant round energy bombs, (shoot at those with any beam) or it will charge at you, )quickly turn into a morph ball and stay out of the middle lane). As you get its life down it will throw things at you more often and change body color constantly. Finally you get its life down and you think you won but you didnt. Go forward into the giant hole.
(Phase two). Now you have to fight Metroid Prime again except in a form that looks similar to a squid. To defeat it, you have to stay away from it. When it charges up a wave, double jump over it. Just keep dodging those. Then it will lay phazon on the ground and turn invisable. Turn on your x-ray visor and run into the phazon. Lock onto the Metroid Prime, and hold A. Now keep on that same visor or change it into the combat or thermal visor. Now its going to do the wave attack again a few times. After its done it will put more phazon on the ground, but this time also summon some metroids. Shoot the metroids, and put your x-ray visor on again. Stand in the phazon and hold A.

(Tips) The more you hurt Metroid Prime, the more Metroids it sends out. Sometimes to see Metroid Prime when you have to attack it, you have to use the thermal visor. Keep repeating this until Metroid Prime dies. If you defeat Metroid Prime, you can unlock hard mode.

To unlock the original NES Metroid, simply beat Metroid Fusion on GBA, then link the GBA (with Fusion in it) to the GCN (with prime in it) then at the main menu of prime goto the bottom where it says GBA link bonuses or something like that. Make sure you have beaten Metroid Fusion though.

To unlock the Metroid Fusion Suit, do the exact same thing only dont beat fusion, but beat prime.

If you are having trouble using the Morph ball bombs to boost yourself up try this: drop one bomb, then one second later drop another in the same spot, then the first bomb will boost you up. Then, about half-way up drop another bomb, then come back down and you will be boosted up, just in time to catch the explosion of the bomb you dropped in the air. The explosion of the floating bomb will boost you up even higher. It may take a while to get the hang of it, but keep trying.

Want to see what the heroine of Metroid Prime does when she's not hunting Metroids and Space Pirates? Don't touch your controller for a few seconds and Samus will start to relax her posture slightly, then opens a flap on her Power Blaster and fiddles with the controls.

Every know and then you should use the X-Ray visor to see if their is any hidden items such as missile expansions and other rare items.