I have a neo geo cartridge that I'm having difficulty finding information about.
Its the "king of fighters 10th anniversary 2005 unique" it isn't recognized as a released cart on the neo geo web site. So Is this cart a home brew or bootleg of some sort?
Yes its a bootleg, homebrew. Also looks to be Korean, might just have a different title. Take a picture of the title screen and character select and compare it to a regular kof2005.
It isn't necessarily identical. But it is a hack. It might possibly do things such as reassign special moves, change up damage, let you change characters at incorrect times, etc.