By defeating Jafar.
you need to lock the keyhole in Agrabah, by beating Jafar.
Agrabah is a world you visit after you beat the first 4 floors at the collisium
i find it easy to try to stay on the top, then attack away and when he skakes his head jump down the back of his head hopes this helps, have fun!
Thankfully, no.
first, you've got to beat agrabah to get green trinity. then, you have to got to traverse town and into the accesory shop and use the trinity mark. go upstairs and talk to the moogle.
Yes, after you beat the Neverland world, you can get it that way for Kingdom Hearts I. In Kingdom Hearts II you would have level up Final Form at level 4.
Go down to his mountain and go in.
Kingdom Hearts 1: Beat Cerberus in the hades cup Kingdom hearts 2: Complete the Pride Lands for the second time
You either go to the world that never was or beat sephiroroth.
Play Kingdom Hearts 2 and wait until Kingdom Hearts 3 comes out. Hope that helps! =D
Yes, Phantom is the optional boss in Kingdom Hearts at the clock tower in Neverland. Other optional bosses include Kurt Zisa in Agrabah, and Sephiroth and Ice Titan at Olympus Colliseum. Just go straight onto The End of the World, you won't need to fight these bosses to beat the game (or even to get the secret movie). Enjoy the ending<3
By attacking her.