From Dragon Quest Wiki
The unhappy hat is a rare hat that appears in Dragon Quest IX. Despite its name, it is not a cursed piece of equipment, but it simply lacks the MP-restoring qualities of its pink counterpart.
|Unhappy hat (DS)|
|Found|| 2% chance of finding in Rank 7 grotto treasure chests.|
Received as a reward for completing Quest #11.
|Equipable by||Priest, Mage, Thief, Minstrel, Armamentalist, Ranger, Sage, Luminary|
|Flavor text||A perplexingly pitiful piece of headgear.|
|Notes||Upgrades into Happy hat.|