For each group of Warrior Cats presented to you, click one or more of your favorites from that group and press the "Pick" button. Eventually, your favorite Warrior Cats will start appearing under "Found Favorites". You can continue as long as you like to construct an arbitrarily long list of your favorite characters!
In principle, this picker is perfectly accurate, provided you pick consistently - you'll correctly get your second favorite second, even if it's pitted against your absolute favorite early on, for instance. You can reorder your favorites after you've found them, but in principle you shouldn't need to.
Feel free to include or exclude certain books based on what you've read!(I suggest removing Field Guides if you want to get through it faster.)
Prequels include Bluestar's Prophecy, Mapleshade's Vengance, etc. Modern SkyClan Books include Firestar's Quest, SkyClan's Destiny, etc. Field Guides include Code of the Clans, The Ultimate Guide, etc.
Art by Ursiday, Moonkitti, Goatpaste, Sunnyfall, and official artists!
Original source code by antialiasis with instructions here, based off of the Favorite Pokemon Picker!
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