Vasco

Best answer as chosen by Asker / Ratings
1. You'll need alot of things, but here they are:
Ultimate Recipe: During your final visit to Twilight Town, while you're unlocking the pathway to the World That Never Was, you'll gain access to the underground computer area. The recipe is in a chest just before the pod room. You CAN come back and get this if you miss it. Ultima Weapon: 7 Orichalcum+ (can be found in:)
1 - Finish Atlantica. 2 - Finish 100 Acre Wood. 3 - Chest at the Brink of Despair in the World That Never Was. 4 - Clear the Goddess of Destiny Cup at Olympus Coliseum. 5 - Chest at the Sunset Terrace in Twilight Town. 6 - Chest in the Central Computer Area at the Space Paranoids. 7 - Collect one of each of the other 49 materials. The Moogle gives you an Orichalcum+ automatically. 1 Orichalcum (Bulky Vendor or chests, eay to find)
1 Mythril Crystal (you need to make it)
1 Dense Crystal - Berserker [12%], World that Never Was
1 Twilight Crystal - Assassin [12%], World that Never Was
4 Serenity Crystals - Assassin [4%], Berserker [4%], Samurai [4%] and Sorcerer [4%], World That Never was. Hope I Helped