Ive found the easy way to defeat ridley is to save your missiles and use the plasma beam

Charge the plasma beam and keep hitting him until he loses his wings then use the super missiles to finish him off

Hello cheators, this is how you beat the thardus. First you go yo your thermal visor, you'll see a "hot spot" shoot it with either, power beam, charge beam,( both power and wave beams) or super missles. After enough hits your visor will disrupt. Switch to your combat visor, you'll see a "cold spot" shoot it with the same weapons.REPEAT. Ta-dah you beat the thardus.

Missile launcher:
When you enter chozo ruinsand you get a
message, go to were it says, beat the mecha hive, (see bottom of cheats to see bosses). when you beat it go along the path jump on the platform and get the item floating above you.

Morph ball:
Go back to were the chozo ruins cut-scene was and find the door were you need the rocket launcher. go along the path and climb over a wall, loads of beetles will surround you, kill em, a mini boss will apperear,metal headed beetel.

Charge beam:
when you get too the place with the save station and the blastcap, go in the door to your left. Find 4 symbols scan them and climb to the top, scan the final symbol on the gate and go through and get the charge beam.

Hard mode:beat 100% of the game

Different samus suit:beat 100% of the game on hard mode and link up to metroid fusion on gameboy advance.