[Spirrow]

Judging by the moving image I saw of a slig with no mech legs,
it almost look toy dinosaur with it's front arms missing and a few
tentacles hanging from it's face like a paramite. Quite frankly, I
can see why glukkons and sligs have such muscular limbs.

I believe that mudokons are humanoids with lizard-like features.
You can see that abe has a muscular body that quite tough. I
think all mudokons have that as their natural body, not to do
with some of them enduring the hardships of slavery. They
climb walls like lizards with their claws, which means they need
strong muscles to pull themselves up.