Ultimate Weapon

You need to defeat Ultimate weapon to get Cloud's Ultimate weapon, Ultima Weapon! You can find him on Disc 3 Flying over a lake near Junon, Fly up to it to initiate combat, the fight is fairly easy, just set up wall and cast haste then beat him up. Simple if you're not crap at FFVII. Ultimate Weapon will bottle the fight and fly off, chase him down, you can ram him with the Highwind as this does not do any damage to you and it makes Ultimate Weapon stop faster. When he stops heal yourself and fight again, he will do the same again another four times, but every time he runs he gets harder to find. Eventually Ultimate Weapon will head for Cosmo Canyon where you have your final fight with him, you get the sword he crashes and makes a path to the Ancient Forest.

Emerald Weapon

You can find him after you have the sub, he is obviously underwater and swims around so watch out if you aren't intending to battle. He is super tough, his normal attack takes off 7000 HP he has small attacks taking off 3000-4000 HP and 300-500 MP along with his super attack he uses when almost dead which takes off 9999 HP. To beat him you will need your characters on L90 or over and will need very high levels of experience on all materia, you will also need all of the materia and all ultimate weapons/limits. You should start the battle by using your character's ultimate limits ( prepared before the battle ) then you should assign someone to continuously heal and nothing else ( the person without KOTR but with the beneficial, healing Enemy Skill White wind ). You should have the KOTR W-summon combo, which you should then use. then continuously mime it until Emerald Weapon is dead. Incase you succumb to Emerald Weapon's ultimate attack you should have your healer and as many other people as possible equipped with the Final attack-Revive combo plus any other combos you think might come in handy. For winning you get an Earth Harp

Ruby Weapon

Ruby weapon is hiding in the sand next to the Golden Saucer after Ultimate Weapon has been defeated. You will have to meet the same requirements as with Emerald weapon. Unlike Emerald Weapon, Ruby Weapon is invulnerable to any sort of attack unless it's claws are in the ground, To get it's claws in the sand you have to start running away, sometimes you actually manage to escape. Attacking Ruby Weapon with KOTR prompts it to retaliate with Ultima, attacking it before it's claws are in the ground causes it to use quicksand, an attack which eliminates one of your party members from battle. For winning, you get the Desert Rose.

Kalm Traveler

In the rightmost building in Kalm is a man who is completely content with the world. But, Once the Meteor is summoned he will begin searching for three items the Guide Book the Earth Harp and the Desert Rose. If you bring these to him will reward you with various rare items. To get the guide book you will have to morph a creature called the Ghost Ship . Take this back to the Kalm traveler and he will give you the Underwater Materia which eliminates the 20 min timer in the Emerald Weapon Battle. Take him the Earth Harp and he will give you the 'Master Summon', 'Master Magic' and 'Master Command' materia. Take him the Desert Rose and you will get a Gold Chocobo.