I knew the pokemon was legit, so I wasn't really looking for outside opinions on the matter. I was just pointing out the discrepancy for the coder; it's since been fixed.
Poor MR. NIDO has a big red flag on him for missing a SID.
http://www.pokecheck.org/?p=detail&uid=339189
He's from my old leaf green cartridge so I know he's legit. It was an ingame trade pokemon.