You probably have to get it from defeating Sephiroth.
No, but if you have Final Mix, you can have a drive form called limit form where your clothes are those of KH1s.
NO! Unless you play KH3 or KH2 final mix
Sorry but kh2 final mix +, is only sold in japan.But still you can go on eBay and have it shipped to you.
You get it once you go through Twilight Town the first time when using Sora.
1 experience for small drive orbs and 3 experience for large orbs.
No, it is forever in Japan.
Final Form, that is the last and the best drive, u can get it at World That Never Was by doing a drive in there and suddenly ull become final form
in KH2 final mix+ yes but in regular KH2 English the closest thing to a secret boss is Sephiroth.
Yes you Could Fly in Kh2 only If You Level up Final Form :D i hope This Hint help you To Level up Final Form You Need To Fight Nobodies which Will Be in The World That Never Was
Unless you have a special modification system like a Gameshark, you're going to have to use a drive form. There isn't a way to become dual-wielding in Kingdom Hearts 2 besides Valor, Master and Final Form. You get Valor Form towards the beginning of the game when you take the train from Twilight Town to the castle of Yen Sid. Go into the room with the three fairies and you receive new clothes and a 'Drive Form'.
Final Form
sadly,no just on kh2 final mix