From the quest "Funny Bone" or "Chipped Tooth" from BattleonTown the New one.
No, they do not have flat skulls, just very small and skinny ones. Their skulls are flat at the top, though, if that is what you are asking.
Sugar skulls, which are small skulls made out of various colored sugars, are used to celebrate the Dia de los Muertos (Day of the Dead). You can make the skulls freeform, or purchase molds to pour the sugar mix in.
No, you can not be invincible in AQWorlds.
Skulls house brains.
You can not. AQworlds does not have a trade system.
There are multiple kings in aqworlds.
because skulls are awesome!
There are no skulls in Halo Reach.
You can only have one armor on at a time in AQWorlds. You cannot combine armors in AQWorlds.
Kuro is the boss in the river in aqworlds.
Search for Halo 2 skulls on www.youtube.com and there will be a selection of videos showing the wereabouts of the skulls or how to get them : )
you can get all of the skulls on multiplayer. =)