Feel free to take my ideas and use them.

Is King Sombra a carnivore (meat eater)/ or an omnivore? He has canine teeth.

This leads to many questions; is King Sombra from a race of an omnivore Ponies (unicorns) or was he once a normal unicorn fallen to darkness?

If King Sombra omnivore (carnivore) it could be good for grimdark/gore fan fictions of him being a cannibal eating his enslaved Ponies, children being the tastiest.

I might not read them myself, I don't support or really like cannibalism or murder and I'd hate to read a fan fiction about King Sombra killing children and eating them.

At the same time it would make him truly evil in fanon fan fiction.