How are fancies “released” and “discovered”?

When a certain combination of traits appear together in a cat, it becomes a fancy cat. For example, if you breed a cat that has onyx, henna, wolfgrey, and slyboots, you will get Negato the Ninja Fancy.

But underneath their ornate exterior, Fancy Cats are a lot like other cats. Their genes work the same way, and they can come from ordinary parents. Really, the only thing that separates a fancy cat from a regular one is its artwork.

What this means is that Fancy Cats are not determined in the smart contract on the blockchain. They are determined solely by their display on the CryptoKitties website.

Developers can therefore “release” fancy cats in this manner. They go into the code for their website display. Normally, cats are just displayed as the sum of their cattributes:

If cat has googly eyes, display googly eyes.
If cat has sphynx body, display sphynx body.

But if developers want to release a fancy, they just a) find a trait combination that doesn’t currently exist in any cat, and b) adjust the code to override the standard picture with a fancy picture if that combination appears.

If cat has googly eyes, display googly eyes.
If cat has sphynx body, display sphynx body.
BUT if a cat has googly AND sphynx, display MISCHIEVOUS FANCY CAT.

What This Means

Recently, the developers announced that they would release a Golden Fancy Cat in honor of their being nominated for the Golden Kitty Award. Basically, they did not plan and code a Golden Fancy from the game’s inception. They just decided to do it because something special happened.

Because the “recipe” for a fancy cat usually incorporates related cattributes, we can assume that the developers will require “gold” as part of the recipe. What else might it require? Orangesoda? Daffodil? Lemonade? Let’s check the Marketplace to see if that combination exists. When you search the Marketplace for that combo, make sure to select “All Kitties” instead of just the ones for sale. 

golden kitty

Yes, it looks like those exist already, so that can’t be the formula for the Golden Kitty. Maybe we could throw in the ganado pattern? Does that exist? No! It doesn’t yet!

So if you’re feeling especially lucky, you can follow your hunch and try to create a cat with gold, orangesoda, daffodil, lemonade, and ganado. Chances are that it won’t turn into a fancy, but you never know! You might get the first one!

What This ALSO Means

Don’t try to create the next Halloween Fancy Cat right now. Even if you have a hunch, chances are 1) the required traits are even released yet, or 2) the developers haven’t assigned it a formula yet. So if you create that combo right now, it’ll just be another combination that “already exists” and won’t be in consideration for the fancy. That’s my opinion, anyway.


I actually don’t KNOW how fancies are released. Some players are convinced that all the fancies have already been decided and programmed. They may be right. But I personally don’t think so, especially because of the developers deciding to release a Golden Kitty (and naming it in honor of, the winner of the Product Hunt contest). That feels spur-of-the-moment to me.

I also think that this method of releasing fancies allows the developers to time the fancies with events, such as holidays or new region launches.

Happy Fancy Hunting!
– Jodiferous


Which Traits are Rare?

There are two kinds of rarity in CryptoKitties, immediate rarity and long-term rarity.

To find out what traits are rare RIGHT NOW, the best tools to use are CryptoKittyDex or the KittyExtension. They tell you the current rarity of traits. You can also check the news section of my sidebar to see what traits have just been released. The newest traits are  the rarest ones in the immediate time frame.

If you want to know what traits will hold their rarity for a longer period of time, check out the Trait Chart. The traits near the bottom are mutations. The darker the blue, the more mutations it requires to breed into that trait. Those traits are usually more rare in the long-term, especially in low-generation cats.

(And if you want to know what traits will be rare in a REALLY long time, look at the boring basic traits that everyone is trying to breed out of their cats. If everyone is trying to mutate out of those traits, it’s possible that those original basic traits will slowly become rare over time. [Excepting totesbasic, which currently has three genes that map to it.])

Want to know more about rarity? Check out this post on which cats are rare and desirable.

Maximize Your Mutations!

To understand mutations, please read this post first.

We know how genes mutate, and we know that stacked mutations–especially in low-generation cats–are generally more valuable. So I’ve created a tool to help maximize mutation potential.


Is your cat’s life dull and drab? Is she tired of giving birth to boring kittens?
Does she want to spice up her life with MUTATED OFFSPRING?!
Then I have the dating service for you!
Use this sheet to find the ideal partner for your CryptoKitty to maximize the odds of mutations.

mutation matchup

Happy breeding!
– Jodiferous

To learn more about mutations and the odds of producing them, visit THIS POST.

A DOUBLE Fancy?!

Related post: How to Make Fancy Cats.

UPDATE: Bad news, guys, there’s no double fancy. *weep* Check out this cat: It has all the traits required for Mistletoe (crazy, oldlace, gerbil) and Dracula (laperm, spock, strawberry, wild_1) and it just became…a Dracula. How boring. (props to @deithy for finding this cat)

When Stitches the fancy zombie cat appeared and we hashed out his recipe, we discovered something interesting. Check this out:

fancy chart stitches dracula

Look! It’s possible to have a cat with ALL the traits necessary for BOTH Stitches and Dracula. WHAT DOES THIS MEAN?! Which fancy would you get?

To know for sure, someone’s going to have to do it. (Chop, chop, breeders, let’s go.)

But in the meantime, let’s speculate. I think that if a cat were bred with all the traits for Dracula AND all the traits for Stitches, it would unlock a TIER-2 FANCY. It would be neither Dracula nor Stitches, but an entirely new fancy altogether. It would be incredibly rare because it would require 8 specific traits(!). And maybe it would be somehow related to the two fancy cats that went into it (Zombie + Vampire = Frankenstein Cat?).

Anyway, someone should definitely do it. The ultimate undead cat awaits.

Happy Breeding!
– Jodiferous

To learn more about fancy cats, visit my post on How to Make Fancy Cats.



How to Make Fancy Cats

Some CryptoKitties are classified as Fancy cats. Their artwork differs from the standard set of cattributes. After a fancy cat is unlocked/discovered, you can breed your own by combining certain cattributes. (Exclusive cats like Genesis cannot be reproduced through breeding.)

Fancy Cat Recipes

DuCat = cymric + tongue
ShipCat = sphynx + luckystripe + crazy + orangesoda
Dracula = laperm + spock + strawberry + wild_1
Mistletoe = crazy + oldlace + gerbil
SantaClaws = cloudwhite + scarlet + beard + wild_d
PhuZiqaat = chartreux + spock + alien + pouty
Stitches = hintomint + swampgreen + seafoam + saycheese
Negato = onyx + henna + wolfgrey + slyboots
Momo-chan = onyx + henna + wolfgrey + sass + bloodred
Earnie = orangesoda + birman + grim + hotrod
MisterPurrfect (limited-time) = strawberry + chocolate + wuvme + baddate
YuriCatsuki = elk + tiger + cymric + neckbeard

For information on how to tell if your parent kitties carry the necessary wild gene, see my post on How to Read Your Kitty’s Genome.

Read More »

Purebred Cats

Before you read this post, make sure you know how to read a kitty’s genome.

Here’s what I think. Rarity in traits is fleeting. Alien eyes are valuable for like a day, and then everyone moves on to the next thing. But purebred cats–cats that have the same gene in D0,R1,R2,R3–will have rarity that lasts. They will have predictability: you KNOW what trait they will pass on. This predictability will come in handy when trying to create fancy cats.Read More »


Before reading this post, you should know how to read a kitty’s genes.

Each trait in CryptoKitties has a “mutation pair” that, when bred together, gives a small chance (usually 14%) of generating a brand new trait not necessarily seen in either parent. Those new traits are referred to as mutations. After a gene mutates, it may then be passed on to offspring the same way as basic traits.

Because Gen 0 cats only have basic traits, mutations tend to be rare at low generations, so they are often (but not always) more valuable.

(Note: Mutations are separate from the “recessive” genes that have a chance to gene swap into the dominant position.)

How do mutations work?

From a technical point-of-view, mutations occur when pairs of neighboring genes (e.g. 00010 & 00011) are bred together. If they mutate, the mutation takes the gene with a ‘1’ at the end and moves it to the beginning (e.g. 00011 –> 10001). You don’t really need to know that, though. You can just use the following method.

In the chart below, you can see that topaz and mintgreen are a neighboring pair. In the right-hand column, it says they mutate into gene ‘i’. Find ‘i’ in the kai column and trace it back to eye color. Topaz and mintgreen have the potential to mutate into limegreen.

To find all possible mutations, please see our updated Trait Chart.

ck kai chart mutations red.png
What are the odds of mutation?

Read More »