... how would a living nebula eat anyway?

NegativeSoul said:

... how would a living nebula eat anyway?

Other Cosmogs.

...'though I imagine hydrogen (from a tank or a generator) would do in a pinch, but it needs to eat a lot then.

NegativeSoul said:

... how would a living nebula eat anyway?

It has a mouth. That question is better asked for the numerous Pokemons that DON'T have mouth but is somehow able to eat.