The Lucky Belt is a secret item in Phoenotopia, which also returns in Phoenotopia: Awakening as the Lucky Earrings.
Phoenotopia[]
In this game, the Lucky Belt can be obtained in Farmer's Block as a reward for completing a side quest. To get it, Gail has to enter the farmhouse and talk to the old man inside, who will ask her to search his basement to see what's making a bumping noise that keeps him up at night. In the basement, Gail will find a Toad hiding inside a crate, which she must kill. Once the Toad is dead, the old man will thank her for her help and give her his Lucky Belt.
The Lucky Belt, when worn, will cause defeated enemies to drop more valuable items more often, making it very useful for collecting money, healing items, or finding specific quest items.
Phoenotopia Awakening[]
The Lucky Earrings in this game have a very similar function to the Lucky Belt, as they also increase the likelihood of enemies dropping items. While not confirmed, it is possible they also increase the Rin dropped from enemies.
They are obtained by talking to Georgia at the GEO Club base after getting an Antique Pin from either the Ancient GEO Dungeon or the Ancient GEO Base.