Hey, I am having one horrific time trying to find the Treasure vaukt Key so I can defeat the last monster and finish out the last of the locked abilities so I can go ahead and finish the game. I wouldn't worry about it so much if I didn't have to have everything so perfect, but eh, we're all crazy in our own little ways right? Any and all help would be appreciated. Thanks!

wasn't that key in the middle of a fountain? if you're at the main place (the first screen after entering the castle) go through the door in the north, get on the chandelier (or something), fall down, head north again and there should be a fountain with the treasure vault key. but i'm not quite sure about this.

Is it the one where the little dude falls into the fountain, or is that the Prison Key? I know you have to fight Catobleas as a reward for getting in there.

Hmm.

The treasure vault key can be found in the fountain outside of the chapel.