There is more than one "unidentified heartless" in different missions
Beast's Castle.
the beast castle the fat guys or the lance
you get cure after beating beast castle for the first time.
Sora, Donald goofy and Beast in times
-Spoilers from Kingdom Hearts 2- It tells you that one stormy night, an enchantress came to the Beast's castle and asked for shelter. The Beast/Prince didn't approve of meager appearances, so she turned him into a beast, which she thought was fitting for his cold heart. She put the same spell over the castle, making the servants household objects.
They're found in Beast's Castle, Olympus Coliseum and Timeless River.
Kingdom Hearts II - World ListHere is a list of the worlds featured in Kingdom Hearts II, followed by the movie, etc. that the world is derived from.Twilight Town(Kingdom Hearts original)Beast's Castle(Beauty and the Beast)Land of Dragons(Mulan)Olympus Coliseum(Hercules)Disney Castle(Self-explanatory)Hollow Bastion(Kingdom Hearts original)Space Paranoids(Tron)Port Royal(Pirates of the Caribbean)Atlantica(Mermaid)Halloween Town(The Nightmare Before Christmas)Agrabah(Aladdin)Pride Lands(Lion King)The World That Never Was(Kingdom Hearts original)
GO to mission 83 or beat bad dogs at beast's castle
When you play against Xaldin the second time around in the beast castle if you ever lose against him and if you die when you fight an organization member out of the castle that never was...I hope that helped
The Beast has until the last pedal of the rose falls to release his curse.
Timeless River: Scene of the fire and Building Site have some large bodies, and there are also a few hanging around Beast's Castle.
I believe it's either the Gargoyle Nights or the Sky Pirates that both drop either dark gems or dark crystals respectively. They can be found in Beast's Castle and The Land of Dragons