Tips Yo-Kai Watch Sidequests

Throughout your adventure and outside of the main story, you may find that your Yokai Watch will sometimes display a "?" instead of the usual letter rank. This indicates that there is a hidden Yokai nearby, meaning you can use your Lens to reveal it. These are known as Yokai Spots and you will sometimes fight Yokai at them, but you wil always receive a set item that depends on the Yokai.
With all of that mentioned above, there are two kinds of Yokai Spots, those with only one Yokai and those with many. The Yokai that shows up in the spot with many different ones is completely random and there's no way to determine what you will get when you reveal them. The good thing is that Yokai Spots respawn, but it takes sleeping for four days and nights (Sleep until morning, then Sleep until night) for them to bre refreshed.