Sometimes (very rarely) in the wild two lions co-lead. Sound far-fetched? I didn't believe until I watched documentary about it.

There are two different times when this happens very briefly during a coalition or a longer bond between two brothers.

A coalition happens when males without a pride work together for a common goal. I see no real way this can be implemented into the game other than roleplay.

A bond between two brothers could be implemented easier though. In the documentary I watched, the two lions were chased from their pride once they reached age. They then worked together and claimed a pride. They had small spats, but never tried to push the other from position. Unfortunately one of the two didn't make it out of a battle.

If this is implemented, it'd have to be a rare occurannce and there's have to be certain requirements such as:

The two males must be brothers (from the same male not female)
They can only take their fathers position together. (You can't trade them and have them take over. An unrelated kings pride)
If they try to take over an unrelated kings pride, only one will be king.
OR
The males could be similar in stats and age and take over any males pride
OR
Identical twins (as suggested by Miss Whispermouse) could be a rare occurance like (not an actual) mutation. If one is chosen to lead the pride, the other will/might follow.

As dual-Kings they can both be studded, impregnate females, and chase/kill lions, battle, and anything a previous lion could do.

Dual battles is out of the question for right now. It'd make this a lot harder to code. There's a thread already about bringing a lion/lioness into battle here -> http://www.lioden.com/topic.php?id=285884430000 Without its approval it's unlikely to have the dual-Kings fight alongside eachother. As of now, you'd simply be given a choice of which lion to battle.

I will link the documentary as sound as I find it again!

Feel free to leave any questions comments or concerns!

current cons:
-could hurt economy
-sub male breeding has been rejected many times

current pros:
-more realistic atmosphere
-more variety
-very flexible idea

suggestions:
"I think studding is what's causing the issue here, so what if you can only stud out one king to the public? But then you can have two lions to make babies with in your den but only earn sb from one of them? " ~Tasha

"Maybe it would work better if it went something like: any breeding attempts to your own lionesses and any stud requests are sent to /both/ kings, and its basically a dice roll which one impregnates the female? Or if she has multiple cubs, some could be sired by one king, and another by the other. If that makes sense? Basically the idea being that both males breed with her, and its random who's "stuff" ends up making the babies." ~Miss Whispermouse

"Or, another possible solution, its bred like a mutation, only its "twins" and they have identical markings/stats and only they can take over a pride together? So its still super rare, and there's not really an advantage because they'd be identical in every way. Any customization would happen to both of them so they stayed identical?" ~Miss Whispermouse (good idea! Identical twins!)