Help with IV spread

[tulleh]

I was wondering why the IV spread in this Mienshao is illegal according to Pokecheck. People were talking about how if I knew how to RNG abuse, I would understand. I've ever come across this problem before.

Sharpedo_Mienshao.pkm

[Kaphotics]

PIDIV is unnecessary for battling with friends.

When generating PIDIVs for Gen V originating pokemon, do not use the PID Finder of PokeGen, just leave the PID field blank and the program will generate.

Not gonna bother downloading the PKM, but if it's originating in B2/W2 it can't be a flawless breed (because it's impossible).

[tulleh]

So perfect ivs are impossible in B/W2?