Alrighty!

The only one that works on this one is Darknyans

The jetnyan one works, but I'll explain the buchinyan one.

In Yokai watch 2, of you go to Mt. Wildwood, go towards the crank a Kai, but take a right before the path. You'll see an outlook, and Mr. E.

Now he'll give you two select a coins...

If, you have used and saved a picture from the Yokai cam in the first game.

So in the first game, you have to have saved two photos of the Yokai cam.

Note!: you'll have to talk to him twice

Now if you use the select a coin, Buchinyan will be one of your options!

Select it and see what happens! :3

Tada! There you have it!

These do work. I tried them.