Shadow Stalker and Dark Thorn

The Shadow Stalker is a boss from Kingdom Hearts II.

Bearing a close resemblance to Darkball Heartless, an enemy from Kingdom Hearts, the Shadow Stalker is the third 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 attacks Sora and his friends by possessing the windows, pillars, chandelier and floor of the castle ballroom. Upon being defeated, it transforms into the Dark Thorn. When merged with the floor, it attempts to devour its foes. Sora can avoid this by staying in motion and jumping. When merged with the window, the Shadow Stalker creates a surge of dark power along the floor, which leaves safe spots to stand on. When merged with a pillar, it attacks with a fierce slash attack. To defeat it, deplete the possessed object's HP Gauge and use the reaction command to force the Shadow Stalker out of the object.

Journal Entry
A Heartless that attacked Belle in Beast's Castle.

It jumped around on the floor, pillars, and chandelier of the ballroom, creating mayhem.