This game doesn't have a password system like the others so I'll offer a few tips and post videos for the last two boss fights.
Holy water is your best friend in this game, you can stun bosses indefinitely with it if you have a 2x or 3x power-up with it. Medusa, Mummys, Frakenstein and the Grim Reaper are all cake with it.
Make sure to whip walls to find food to get some of your health back, there's more than enough to keep you topped off.
Lastly, if you want to make it easier on yourself use the save feature often.
Grim Reaper
Dracula