The sour Lemon Candy restores 5 HP and 15 FP. Tayce T. cooks it when given a Lemon and Cake Mix.
Lemon Candy is Anti Guy's favorite candy, and can be given to him in exchange for access to the treasure chest he guards if the player doesn't want to fight him, although it's more recommended that the player fights Anti Guy so the player can gain more Star Points.