Well, since Vykkers labs is [or was, rather] air-borne, I would think it's safe to assume they're not native to mudos....so, I would imagine that the interns aren't, either.
I think weiner boy [
] has the best theory this time.
Although....Interns could very well be above vykkers, hence the stitched lips, and modified feet. I mean, think about it...The vykkers wouldn't want to be working side by side with a creature that could possibly outwit and/or over throw them, so they give them 24/7 access to music and drugs...and keep the interns busy with mundane tasks. Since the interns are also so lazy, it wouldn't surprise me if OWI was poking fun at their actual interns....you never know, I guess.