I can't shoot that theory down entirely, but there is nothing to back that up.
It could have happened; but when, how and by who we don't know.
Older races like skirt na we have no basis to amuse they aren't morphable, and they been around since Father.
Ellimist was visiting Andalites before he came up with Pemalites; and was becoming superdimensional when dinosaurs ruled the earth.
Plus, didn't Crayak make Howlers in a the same way The Ellimist made the Pemalites?
I don't like the alien farmer theory; they come, plant life, build pyramids and take off, but no, it's not impossible
