I am no longer looking for Darkrai codes at this time, as all six games have one on them. I still need 3 Zapdos codes though.Are you interested in Game Stop codes for the Pokémon 20 - Darkrai?
EDIT: @ 1:15 am May 22nd 2016, I reset this Xerneas:
OT: XYZ (05116) (Lv. 100)
Nature: Modest - Ability: Fairy Aura
Tradeable Stock : 1
Notes: Reset this myself, on X file . I have 4 more of these left to reset. Trophy Case.