>>58164293
having a small sliver of magnitite in your brain for direction like a bird or fish does not mean you levitate your nonmagnetic limbs around with magnetism.
It explains why onix takes to a metal coat so well perhaps, but it doesn't explain the levitation.
>>58164309
an excellent question. How does magnemite eat pokepuffs/beans without a mouth? There is a list of pokemon that cannot eat pokepuffs, they're all pupal forms of insects, plus cosmoem which is still kind of a cocoon. Magnemite? Not on the ban list. Unown too.
Porygon Z can eat too, and its head isn't even attached to its shoulders.
No one knows. Personal best guess? We know pokemon are beings made of what amounts to elementally flavored magical energy. I don't think pokemon actually have internal organs. It's why the stump of dracovish's tail looks like that and why it can survive at all.