Board Thread:Nintendo 3DS/@comment-1027970-20131003203746/@comment-5024284-20131008010943

Kerosene Kindler is actually a "Common" weapon. When fighting a boss, I suggest watching its pattern so you can guard when it attacks. Kerosene Kindler doesn't have many batteries and charges and recharges slowly, so I suggest you guard when necessary and only attack with no charges when you have at one and a half batteries charged. This way, you don't run out of batteries when you need to guard.

Or if you really want to start over, you can go to settings on your mii plaza. Go to more options, and there should be an option to restart you Monster Manor progress. If you want to get better weapons, make sure you have plenty of space and many pieces that share a similar color. Simply placing different colored pieces everywhere doesn't net you many treasure chests. The trick to getting many treasure chests is to surround a space with one color so that it needs to be filled with a specific shape. If you do that, you can even get gold chests if the gap is large enough.