I've seen a lot of fan bosses but I got to say, Bisect man is very interesting. Most bosses are based on other bosses but I can't seem to find any similarities to any other bosses making this boss unique. However I think adding Myco man was unnecessary. Other than that, Bisect man's design, attack and moves are good. Sorry to say but I'm not that big of a fan when it comes to randomness so sorry peppermint candy. His attacks may be similar to Cut man but at least he has more attacks than that. Lastly I think you should add a bit more like Intro poses.