In Hollow Bastion, Sora fights 1000 Heartless alone (a gauge tells how many he's defeated during the fight), because he gets separated from Donald and Goofy. After killing all 1000, a cutscene plays.
You battle them
In Kingdom Hearts 2, the Battle of 1000 Heartless occurs when Sora has to fight 1000 Heartless alone in Hollow Bastion. It's easy enough; just keep using action commands and you should be done easily.
Kingdom Hearts is the collection of hearts that the Organization XIII has, they are the hearts that Sora took from the heartless, the hearts rose up from the dead heartless and went to Kingdom Hearts, which is in The World That Never Was.
Showdown at Hollow Bastion
Nope.
The heartless thing is a kind of guardian that protects him during battle.
Battle very perfectly in a heartless battle from floor7-13
The Trickmaster is a boss villain in the Kingdom Hearts games, found in the Wonderland. He is a Heartless.
I think to keep the trapped hearts inside
You have to find lots and lots of heartless.
It is called 'End of the World'. and it is were you battle a heartless called "World of chaos" and ansem is inside it
In the battle of 1000 Heartless, the Nobodies easily defeated the Heartless, so Xemnas should probably be stronger then Fake Ansem.