This guy is super easy he can die in one cycle if you are fast enough.
Super Monster Milk and a Bubble Shield is all you need.
You'll have to shoot the top of his back until you figure out which order of Red Buttons on his back need to be pressed. Just use your cannon and pick a button until they turn Green. You have to hit them in a specific order or else he will launch an attack which a Bubble Shield will defend against.
When you get the order of buttons right his tail will open up. Once the tail is open whip it with your hair as fast as you can. Depending on speed and strength you may be able to kill hi right away.