Every character has an Ultimate Weapon, this weapon has no materia growth but hass all linked slots and the best attack and defense.

CLOUD
After you awake Cloud from his coma there will be a Weapon floating in the air near near Red XII's village. Ram it with the Highwind until it has stopped. Once it has stopped ram it and destroy the weapon. You will get the Ultima Sword for it.(TIP: If you destroy it in the right place you can make a crater to the frog forest, if you cannot breed chocobo's.

TIFA
Talk to the guy near the gate to Midgar, he will tell you he lost his key. Go to the bone village. Pick a normal or good treasure and sooner or later you will find his key. Give it to him. Well in Midgar, go to the item shop in the slums and operate the machine, and you will get the Premium Heart.

BARRET
During your assault on Midgar, put Barret in your group at the last save point. On the way upstairs he will find a chest with the Missing Score.

AERIS This one is not like the other ultimate weapons, but anyway, go to the 4 on the clock in The Temple of the Ancients. You will find the Princess Guard.

RED XII
Go to Bugenhagen on Disk 3 with Red XII and he will give you the Limited Moon.

CID
You must get 5,00o points from the laser game in the gold saucer to get the Flayer, new info, batter than the Venus Gospel, normal materia growth!!!

YUFFIE With the submarine, go to the underwater plane, you will find the Conformer.

VINCENT
In disk 2 take the sub to the waterfall. Get out and go in the waterfall. You will have a flashback. Return in disk 3 to recieve the Death Penalty.(Don't worry, it's only a gun!!)

CAIT SITH
During the assault on Midgar take the route in the subways that leads back into the building from disk 1. You will be told to turn back, but don't. On the 64th floor, search the lockers for the HP Shout.