Money can be kind of hard to come across in the second Wizards and Warriors game, you don't really need it for much, but it's nice to have when you do want to buy something.

So, to make it easier to raise some cash, you could go to the title screen

Press and hold Up on the Cross Pad + B + Select, and while holding all of those, press Start. Done right, you can go to your nearest merchant and start playing the gambling game. The skull will always land in cups in the following order: 1, 4, 3, 2. And then repeat. You can sit there racking up cash for as long as you like

I was able to accumulate a tidy sum until I screwed up the rhythm and picked a cup out of sequence. Once that happened, the pattern ended and I had to go do something else.