Bear, lion, house cat even, pretty much anything that could eat a regular person could eat a vegan.

They’re probably breatharians

Deep sea fish, potatoes, beets and carrots?

Or nothing? Some insects don’t eat in their adult form, just mate and die, so I guess they could.

Turns on ultra high power lamp

Eats ultra illuminated bacon

“Ah yes, the veganest of meals…”

I’ve thought of this exact same thing, because of the exact same episode.

I ended up interpreting “cast no shadow” as not being exposed to light under normal circumstances. In other words, a lvl 5 vegan can only eat vegetables that has the edible part under ground. Potatoes, carrots, etc. Fruits and berries are no-go. Maybe even there’s a requirement that said vegetables have to be harveated and eaten at night time to avoid shadows.

Also, I think you intended to put the word “eat” at the end of the title.