Kong Story short, this is a remix of the Final Boss theme from Donkey Kong (Gameboy). But it also contains themes from the Arcade game, like the opening (also Donkey Kong Country) and the famous intro. And there's some Rattle Battle (DKC 2) in that mess as well.
Man, man. There's a lot of work in this one, and I don't even know why. It's just...Donkey Kong, you know. Just that.