This article is from the Final-Fantasy and other Square Soft Games FAQ, by email@example.com (Nick Zitzmann) with numerous contributions by others.
To get your hands on a secret treasure in Shevat, you need to find the
The RPS Badge is in Lahan. Search for a guy who plays Paper, Rock, and
Scissors and play with him until he gives this to you. You need to beat
him five times in a row before you can get the badge. Be warned, this
may take a while...
The H&S Badge is in the town around Fatima Castle. Keep searching for
the boy who plays hide & seek. He appears in a different place each
time, and each time he hides in a place you would never expect to find
anyone. Keep changing the camera angle, and you might just spy him.
The Tag Badge is in Billy's Orphanage. Help one kid fence up some
chickens, and he'll give you this. This is very easy.