Mutations are wicked cool and I think there are some cool ones that have been documented in real life that would be awesome to have.

EDIT If you're going to comment about any of the following:
-"Real leucisitc lions are cream colored!"
-"We already hace achromia!"
-"We already have a white base and an albino base!"
Don't. I don't want to hear it. Just leave. I don't care because that's not at all what I'm suggesting. What I'm suggesting is depicted below. I don't want to hear how you can make a lion who's sort of kind of close to this with markings, because that's not a mutation, those are markings. Besides, Melanism is in the goddamn game and it can also be made very very very very very easily with onyx bases. But that wouldn't be the mutation, would it? I'm tired of hearing about it. If you're going to bring that here then don't, I'll just block you.

[EDIT] MELANISM IS IN THE GAME! You can see the first cub born with it here! http://www.lioden.com/territory_lion.php?id=128047120030 [/EDIT]

[EDIT]
I just wanted to make an adition to this thread and remove albinism and melanism from the list, however I wanted to show more clearly what I meant by leucistic. Yes, using a white base, with white mane and no markings would work, but that's not a mutation, that's just a collection of markings. What's more, they aren't really what I had in mind for the mutation at all. The leucistic mutation would look closer to this:



As you can see, it's a far 'snowier' white, brighter and almost mythical looking, along with a darkened nose and lips/inner muzzle.

I still personally think leucisim would be a really gorgeous and frankly well-loved mutation!
I'm basing this look on this particular real photo of a leucistic lion:


I also added images for the Chimerism :3

1. Leucism.
>This is a mutation that occurs when there is a significant reduction in pigment, resulting in white coloration. This is most often characterized with white or nearly-white coloration, but often with blue eyes.

This mutation would show up at birth and would be characterized by a white coat, blue eyes, and dark black nose/around the lips area. It would be completely white, including mane and other markings, if they had any. This could be seen as a bad thing for some users, but so are some of the other mutations. This is NOT the same as albinism, which I'll get into later.

2. Melanism
>The opposite of albinism, where the coloration of the creature is entirely black. This is the result of over-saturation of dark-colored pigment called melanin. This is how panthers occur in nature, as well as black lions, black tigers, and other creatures from snakes to elephants and so forth.

This mutation would also show up at birth, and would result and a pure black specimen. The eye color would vary, but all markings would be black.

3. Albinism as a mutation
>I'm a little confused as to why 'albino' is a base coat, because albinism is a mutation in real life in which there is a absence of pigment, especially melanin. I believe that albinism should be made into an actual mutation because that's what it is, and have it's base [and those already on the site that use it] just translated to 'white' instead.

The ablino lions would be characterized by pink/reddish eyes, and a white coat that would be more pinkish and 'clear' than that of the leucistic. Albino lions in partiuclar usually have a yellowish hue because their fur and skin lacks all pigment so ti tends to reflect the light. Leucistic lions are pure white, as in their pigment is entirely white and therefore would be more snowy or stark in comparison to the pinkish or yellowish hue on the albino. The pink/reddish eye is because of the cells that would have had color being clear and therefore showing the blood vessels through.

Albinism has a chance of being lethal because of it causing several other disorders that can lead to dangerous sunburns, skin cancers, and blindness.

4. Chimerism
>A chimera is a creature with two genetically distinct sets of cells. This commonly results in particular coloration, such as a split-difference between the two organisms. This makes the creature it's own fraternal twin, though is stable.

This would be a VERY COOL and non-lethal mutation. It would be characterized by the lion being split down the middle in two different colors. The most common cases in mammals usually involve a straight line in the face that splits it- there was an internet sensation house cat who had it, where exactly half of its face was black and the other was tortise shell. This would be the case here, as well- it could also work on all manner of markings, where half of the animal would have it and the other half wouldn't. This could end up with all sorts of mix-and-match and I've seen it where whole limbs will be different, but it's usually the face that shows the 'split'. It can be very subtle, such as there being a sudden end to a marking, or it can be drastic, such as one half of the face being black while the other is fawn or cream. It will almost always result in heterochormia.

Around the possible coding nightmare:
I am aware that coding a mutation like this would be a huge problem, but I was thinking it could be something like making a color that will 'wrap' around the lion's already existing colors.

Basically, for example, if we made the sections of the 'twin' black, then the black would cover up those parts of the lion. It would be a painted-on marking like stripes, but because it is a mutation, would not be a marking that is passed down directly or have a %.

I honestly have no idea how the coding for this site works, but that is just my suggestion for how it might work!

Here are a few photos of animals with chimerism!