Animal Crossing Wiki
The food item can be found at Fortune Cookie.

Katrina telling the player their fortune

A fortune is a type of service in Animal Forest, Animal Crossing, Wild World, City Folk and in New Leaf. The player can get the service by either going up to Katrina's tent, or her shop (in City Folk and New Leaf). The service will include Katrina chanting some words then followed with her telling the player what type of clothing will bring them luck. Depending on the game, fortunes cost anywhere from 50 Bells to 500 Bells.

Types of Luck:

Money Luck- Trees drop 200 bells instead of 100, money rock drops 200, 300, 500, 1,000, 2,000, 4,000, 8,000, and 16,000 bells, villagers give the player more money.

Friendship Luck- Easier to increase friendship with same-gender villagers, special conversations with same-gender villagers are more likely.

Love Luck- Easier to increase friendship with opposite-gender villagers, special conversations with opposite-gender villagers are more likely.

Item Luck- More likely to get Saharah-exclusive items, more likely to get newer items from giveaways, more seashells appear on the beach, villagers are more likely to offer something to sell, more likely to get rare items in Leif's weeding mini-game.

Physical Luck- Fewer jellyfish, bees move more slowly so it's easier to evade them, fewer mosquito bites.