I've had a great idea for how a boss will fight, but haven't been able to put it on one particular boss. So, I decided to put it on the Blocky King. I won't say how he fights, I think that is best saved for seeing it for yourself.
Than again, it's not really that big of a suprise when you see it, but I think it should be left for the player to find out. Here's a hint:
It's like a certain classic arcade game.