You have to gather all the needed items to synthesize the Ultima Weapon in the moogles shop.
First, you have to get the Ultima Weapon recipe from the basement on the way to the room where Sora wakes up after Roxas finds him, then take it to a moogle. You have to have given the moogle every kind of material and have all the ingredients for the weapon. Also, you need the ingredient that halves the amount of an ingredient needed, so you can have all the orichalcum+ ( i think its orichalcum+)
Go to the mansion in Twilight Town and go to the room where Donald and Goofy were sleeping in their pods when you were playing as Roxas at the beginning of the game. You can find it next to Donald's pod. Once you have it, go to a Moogle Shop and you can synthesize the weapon.
Solution 1: First at the beginning of the game while your still Roxas choose the sword. Then level up to mid 60s and get berserk charge. Equip it and while fighting Sephiroth use trinity and berserk back to back to beat him. Also make sure you have plenty of Hi potions. Solution 2: Use the Ultima weapon. Solution 3: Level up to level 99 and kick his azz.
Roxas was born before the old, mysterious mansion in Twilgiht Town.
Beat the final sector in hollow bastion in which you are required to be level 80 and higher and beat data roxas without dying
You must upgrade scan to lv.3 or lv.4 and go to to hollow bastion. in the place that you find the last piece for the door, there will be a lv.80 Sector, which is very hard, and has a bugged version of roxas on the 13th floor. defeat him and see if you have enough SP (sector points) to get it. hope it helped!
Pandora's gear + has every ones (In my opinion exept Roxas and Sora's.) strongest weapons. sora roxas and riku all have the zero gear riku has way to dawn sora has dream sword and roxas gets duel wield roxas with zero gear and three ability units. but Axel's is with Pandora's gear +. it is called prominence + it gives him +110 strength + 34 magic + 10 critical % and +10 critical bonus.
if you look well at people (such as roxas) you'll see differences and there are extras such as fighting hooded roxas
Purchase Zero Gear 5 weapon panel and link three ability units (L). Roxas will then hold two keyblades in mission mode.
It's called Dirge of the Fourteenth.
in kingdom hearts 2 if it is.you have to be far, and you have to go to the heartless's PLACE then you get trapped by the heartless.Then you fight him. Just if you know the final boss is Xemnas.
No sora is roxas, well roxas is half of sora, because roxas is soras nobody.