I've been hearing the easiest and fastest way to unlock Final Form is through the Cerberus Cup, right? Wrong!
There's an easiest and fastest way than to go to the Colosseum and pass through all that hassle. This is it:
Right after you see the Sora vs Roxas cutscene you can acquire the Final Form. So, what you have to do is, right there at "The World That Never Was", go back to "Fragment Crossing", there activate a form. If you don't get the Final Form, without reverting back, go to "Alley To Between". You'll appear with your 5 Drive Gauges. Go back to "Fragment Crossing" and try getting Final Form again. Repeat until successful.
Since you don't have to wait for the tournament to load (just an area) this is the fastest and most immediate way to get Final Form. I got it in less than a minute this way right after the cutscene.
If this was already know, then... sorry for all the ruckus! :P
Why would anyone have the problem with the speed of cerberus cup? You just have to select a form, if it isn't final hit start and retry. I imagine the 5 seconds it takes to load from retry is a lot faster than walking to another area.
XBL Tag - DivineItachi http://live.xbox.com/member/DivineItachi