Could someone please tell me how to defeat Frankenstein at the foutain? He just keeps killing me and this is becoming very frustrating. I've tried really hard and haven't succeded yet.

Frankenstein’s Monster.

This boss is a big guy with plenty of power but he is slow moving.
The shotgun doesn't do much damage against him, and the best approach to win this battle is actually to stand as high on the fountain as possible.
Make sure you have your pistols and they are enchanted then attack, keep this up moving slowly around the fountain to avoid Frankenstein’s Monster It works quickly without losing any to very little life.
When you have scared off Frankenstein’s Monster, don’t worry too much about breaking the vases because you come back here later.
From Kinky's Walkthrough.

I beat him by jumping then shooting.

What I did was use the Dodge Fire and the enchanted pistols. Works just as well and looks way cooler!!!