I can hear this being music that plays when about to battle a Team Rocket grunt haha. Nice! The synth that comes in the last third really adds to the grunt vibe. As for something to consider tweaking, for me, the intro bar make it seem like we are about to go into a happy tune. I think using a few different notes to make it little more dirty sounding would be cool. And then just keep the snare out for that intro bar. Overall thoug, really dig it!