Do you earn anything by finding all hidden chests?
The treasure chest monster in Monstro Town will let you know how many hidden chests there are to find in the game. Do you get anything from him (or from anybody) by finding them all?
Solution 1:
Unfortunately, there is no reward for finding all the hidden chests other than what you find inside (plenty of flowers and frog coins) and a pleasant feeling of satisfaction. That disappointing moment from my childhood when I got that last box and discovered this little tidbit still haunts me.