The Ghost of Scar
From Kingdom Hearts Wiki: A world of information not accessible by Gummiship
The Ghost of Scar is a manifestation of Scar's lingering darkness that appears in Kingdom Hearts II. It stalks Simba, due to the unease in his heart about taking his place as ruler of the Pride Lands.
Kingdom Hearts II
Sora, Donald, and Goofy return to the Pride Lands, only to find Simba being plagued by the Ghost of Scar. Simba's fear and uneasiness while facing the Ghost of Scar make him the laughing-stock of Shenzi, Banzai, and Ed.
Sora tries to find out the cause of Simba's fear; Simba only replies that he is unable to follow the footsteps of his father. Sora tries telling Simba that he just has to be himself, but to no avail. After failing to talk things out with Simba, Sora and company leave in a huff; they hide behind a log in the Oasis and, perhaps as a method of coercion, create a replica of the Ghost of Scar to help Simba gather his courage. After they successfully helped Simba to regain his composure, Nala, Timon, and Pumbaa are confronted by the Ghost of Scar, and Simba chivalrously tells the Ghost to disappear. Soon after, all of the Ghosts gather together, forming a giant Heartless known as Groundshaker.
The Ghost of Scar is nearly identical to Scar in appearance, except that his body is formed from a dark miasma, with tendrils of darkness streaming from it.
The Ghost of Scar appears in all of the areas in the Pride Lands, but never attacks. Instead, it chases Sora and his friends if they run away and circles them if they stand still. Undoubtedly, it has the lowest amount of health of any enemy—one HP—and will perish with one hit. However, it will reappear if Sora enters another area.