Eh... I can hear SOME semblance of Dark Meta Knight's theme, but it's just BARELY there. Not to mention, it all sounds rather clunky to me. Given that this was made in 2007, any advice I would give would, by now, be a moot point, but sound equalization and balancing, man. This piece NEEDS it. Badly. Also, I've heard Dark Meta Knight's theme, both in Amazing Mirror and in Triple Deluxe, and I am also in the process of remixing it myself. This barely has any resemblance to the original or the remake due to the way the notes are carried out.
Could be worse, though. Could be a random, jumbled mess of imbalanced sounds.