I know, this post is useless, and has no point at all, but whenever i see one of these 4, i remember of the others.
Do they have some relation?
I know the Shadow Stalker is Dark Thorn first phase, but... what about the others?
The Common Dark Ball.
Shadow Stalker, KH2.
Dark Thorn, Shadow Stalkers' second phase on KH2
Hunter of the Dark, from BBS Final Mix.
Let me know what you think.
EDIT: Yeah, i know, they're all heartless, duh. Pureblood, to be specific, but is there anything more about it besides being PB Heartless?