There are like 7ish bosses and as for the names I don't really know, up till now I have just called them knight boss, dragon boss, and pirate boss. And thanks about the Pirate, I'm not that good at pixel art, I took the built in green guy sprite and changed him around a little. I think he turned out pretty well. (The reason I say 7ish bosses is because I like packing my games with Easter Eggs ;)