Katrina has returned to Animal Crossing, making her New Horizons debut as part of the 2.0 update. The update introduced a ton of features and also expanded on existing features, including Harv's Island. Katrina and her Fortune Shop can be found on Harv's Island after it is fully funded (100,000 bells).
Working exactly as she did in previous games, Katrina controls the luck on the island and the curses. Players can visit her to find out their luck in certain categories at the beginning of the day.
If they don't visit her, there won't be any luck, as it is a special feature activated by speaking to Katrina and does not affect players otherwise. Here's what players should know about Katrina and their luck in Animal Crossing: New Horizons.
Luck in Animal Crossing: New Horizons - How Katrina does it
Players can visit Katrina and receive their fortune every single day. If they do, they have four categories that can be influenced by luck.
These four categories can have good or bad luck on any given day. Whatever the luck is, it can have drastic effects on those categories.
For the belongings category, if luck is good, villagers will give more gifts to Animal Crossing players on that day. Additionally, tools will not lose durability when used. However, if the luck is bad, tools will lose durability even faster than normal. Animal Island will not have a Gyroid fragment either, and Nook Miles tickets won't let players go to Gold Island.
For the money category, if the luck is good, 1,000 bell bags turn into 3,000. Hitting rocks has a better chance of finding gold nuggets. If it's bad, players will get no gold nuggets and there will be less bells in a balloon gift.
For the health category, eating food will last a lot longer if the luck is good. If it's bad, food will only go half as far and Animal Crossing players have twice the chance for tripping and falling.
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Finally, for the friendship category, if the luck is good, Animal Crossing players will gain a point of friendship with villagers they've spoken to before and can get more gifts from them. If it's bad, they will lose three points with those same villagers.