I was just wondering if the 7 Princesses of Heart only opened the Hollow Bastion Key Hole or if they could open up others too. I mean, if they all got together at Disney Castle by Malificent, could they open up the key hole and let darkness rummage throughout the castle?

Yeah, they possibly could. But then again, Malificent would have to go to world to world again and again and capture each damn princess one at a time AGAIN to do it.

And didn;t it took her ten years to jsut capture them all once?

Yes it her ten years to capture the all. And if i think it would way to hard to get Kairi a second time with Sora and Riku around.

trust me it would be impossible to get Kairi a second time with Sora and Riku in the way from after KH2 ended. Sora could let Roxas out and it would be 3 on 1 lol

You know, I am pretty sure they would have to be gathered at Hollow Bastion and know where else because of a couple things. First of all the seven princesses of heart open up the final keyhole and they create the keyblade of a persons heart. The keyhole of Hollow Bastion is described to be in the basement as the ansems reports say. It wouldn't make sense for there to randomly be two keyholes especially if the one is hidden in place with darkness coming out and accessible by a portal hidden behind a wall (before it was destroyed). Secondly Hollow Bastion is also described as the capital of light giving the world further importance.

They probably could, but I think at this point Maleficent needs to come up with a new plan to take over the universe.

wait...didnt maleficent say the corner stone of light prevent her from entering the castle...but yeah it'll be awhile but paceintce is the key

They could open any keyhole I belive