Here are the Ultimate Weapons and their Location per Character in Final Fantasy 7:
Cloud Strife - Ultima Weapon - found after defeating World Boss: Ultima Weapon. At disc 3, fight Ultima Weapon floating around the Nibel Area. Fight it and Follow it until he stops near Cosmo Canyon. Defeat him and you will acquire the 'Ultima Weapon'.
Tifa Lockheart - Premium Heart - found in the Inn at the Wall Market. Once you get the key to sector 5, go back and check the broken vending machine in the Wall Market.
Aeris Gainsborough - Princess Guard - found at Ancient Temple near the end of disc 1. In a room where you need to move a number of clock hands, play with it until you can pass through IIII. Save
Barret Wallace - Missing Score - found on the staircase before Hojo scene on disc 2.
Yuffie Kisaragi - Conformer - found in the Sunken Gelnika at disc 2 or 3 near Gold Saucer. Use the submarine to get there.
Cid Highwind - Venus Gospel - found at Rocket Town in disc 1 or 2. Talk to the man looking at the leaning rocket outside of the Item Shop for 3 times.
Vincent Valentine - Death Penalty - found in a waterfall on a side of a crater lake doing multiple events. At disc 2, Using the submarine, go to the spot where you found the Key to the Ancients. If you observe around, you will find another narrow passage. Go through the passage and surface at the end. Go inside the waterfall and talk to Lucrecia. At disc 3, come back to her and she will give you the 'Death Penalty'.
Red XIII - Limited Moon - found at Bugenhagen's Observatory in Cosmo Canyon after the arrival of the WEAPONs.
Cait Sith - Marvelous Cheer - found in a locked locker in the Shinra HQ during the raid on Midgar on disc 2. It is in the room where there are exercise equipments and lockers.
Yes, there is a trick to dodging lightning 200 times for Lulu's ultimate weapon in the final fantasy X.
Tidus's Celestial weapon, or Ultima is the caladbolg
the omega weapon ( the final upgrade for all of lightning's weapons )
Omega weapon is only in Dirge of cerberus.
Emerald Weapon
Her Celestial weapon is named the Onion Knight.
Yeah especially if it uses terra break!
Ultima Weapon.
Omega weapon is the strongest of all the weapon monsters I believe.
Yes especially if it uses Terra Break.
800,000.
If i beleave rightly the damage limit in final fantasy 12 is 99,999, that is the same for ff10 and 10.2. Wereas final fantasy 1 - 9 is 9,999. Hope this helps.