A quick fix for Castlevania that addresses some of it's faults.
Listed below are the changes I made:

Increased character speed
Do not lose whip powerups when hit by enemies
Coins changed to money bags
Hearts changed to Castlevania potroast
Crosses changed to Medicine jars.

Now there is also a patch for The color version of this game.
Patch it to Konami GB Collection volume 1. (GBC Version)

Contact info
iamstillhiro1112@yahoo.com

Thanks to Ugetab for finding the character speed and whip addies.