[Wonderboy in the monster land] what to do with the charmstones?

[Rafael (Dollynho Maromba)]

I beat the last boss, but I still have in the inventory 2 charmstone(they can be bought for 500000 money). Does anybody know what to do with the charmstones? After I bought one, the salesman would say it, but kept on secret.

[Panda o' Plenty]

tshhhh.
It's a lame secreeeeet.
One of the NPCs in town hub tells you that there is a secret door which leads to a secret shop if asked near the end of a game.
It's in that shop district, lowest floor, between two pillars of sorts, at middle of this particular leaves-covered walls.

[Rafael (Dollynho Maromba)]

Thanks! Before reading, I have talked with some NPC and he told that there were a secret place in the town. I've serched, but didn't find it. I'll try it again!