The boss music from Super Bomberman 5. Not recommended in levels that have the timer on, as it will sound weird when it gets sped up because of the Drums sample. Either do a hex edit on $008E5C as explained here or set the timer to 0.
Probably the hardest part of the game. The AI of the bosses was cruel and the fact that later ones had so many powerups from the start made it pretty annoying to deal with any of those. Die once and you have yourself pretty slim chances of actually beating these guys.
The Iron Mask one with the axe was the worst tho. Small arena, lots of hp and the ability to summon enemies which chase you and have also more hp. Dog surely was harder than some others but at least he only had 2 hp.
Actually now something on topic, this sounds pretty close to the original song, which is great. The game has some pretty bangers. Great job on that.