Shadow Stalker and Dark Thorn

The Shadow Stalker is a boss from Kingdom Hearts 2.

Bearing a close resemblance to Darkball heartless, an enemy from Kingdom Hearts, the Shadow Stalker was the first boss of Beast's Castle. Called upon by Xaldin to capture Belle as a last effort to turn Beast into a Heartless, the chandelier-like creature attacked Sora and his friends by possessing the windows, pillars, and chandelier of the castle ballroom. Upon being defeated, it transformed into the Dark Thorn.