Dark-Makai (sometimes known as Dark Shar-Makai) is a cheap edit of Shar-Makai from the M.U.G.E.N game, The Black Heart. It in a nutshell is Shar-Makai with many cheap enhancements, such as regeneration, immunity to custom state and faster attack frames.
As said before, Dark-Makai has many cheap enhancements. such as regeneration, immunity to custom state and faster attack frames, thus allowing it to combo extremely fast. Many of its attacks also receive enhancements when using the 12th palette, making it a quite dangerous opponent.