Brutes are created by the Skaarj.
Mercenaries are... another, indipendent race of aliens, and there isn't a lot of official info about them, aside the fact that they are tough as heck. They are the rivals of the Skaarj.
Slith,Titan,Tentacle=Native of Napali
Queen= Big ass momma, pupae grow fast into her as you see she still has pupae legs on her.
Skaarjwarrior=stage of warrior classes where they are mature but they keep adapting or growing.
Warlord=Sick minded skaarj that can sex the queen up. Last stage of skaarj males. Tail removed.
Krall=Skaarj slave
Brute=Genetically Engineered idiots
Nali=Kenyans of Na pali
Mercenary=Scientists Aliens not for domination of universe but to study.
Stone Titan=King of Titans
SkaarjTrooper=The more advanced skaarj, the skaarjwarrior descents technology is inferior. Skaarjwarrior and Trooper classes have racism hate.
Fly=Diseased fly with skaarjilitnas (Skaarj anger)
Devilfish=Fish that mutated from skaarj waste
Squid=Likes to hug
IceSkaarj=Abandoned idiots that just guard what they were taught to guard, they are frozen berserkers but cold has tamed them down.
Warlords are part of SkaarjTRooper classes due to technology advancement... and little or no tail, They are still hated by skaarjwarrior class because they are more intelligent and they are selfish.
Warlords can't be from skaarjwarrior class because their physique is way different.
SkaarjTrooper last stage is Warlord
Skaarjwarrior last stage is berserker where they are too big to be controlled and have become very primal and animalistic
Pupae are first stages of baby queens they aren't skaarj males, Skaarj males are born as skaarj completely.
Skaarj males are born from queen's womb while pupae are from eggs.
SkaarjTRooper are born from her womb, and skaarjwarriors are either the retards or the southern race