Advance the story line, If already unlocked go top the world map and select it
Im afraid that that's only on Kingdom Hearts 2 final mix.
In the garden area there is a hedge castle its in there
You don't meet Terra in Kingdom Hearts 2, you meet him in Kingdom Hearts 2:FM, I think he shows up in the Cornerstone of Light in Disney Castle.
you can find them in the Disney castle level in the courtyard
You can't use anyone except the original three
there are quite a few in timeless river, which is located inside of disney castle.
Go to the save point and click on the option that will get you to the space menu. Them fly to hallow bastion
Disney Castle automatically becomes available after the completion of certain events in Hallow Baston. It is unavoidable and is one of the first worlds unlocked so it wont take long to get there.
Going by the cover Disney InterActive and Squarenix
you get cure after beating beast castle for the first time.
the beast castle the fat guys or the lance
It's in the basement of Mickey's castle