Okay, I want to have at least ONE Uber team, so here it is. Note I will not use Deoxys (since it is what you call game-specific) or Wobbufet (I lack patience, so this is hard for me to use). Note: If there is a N/A where nature is, it is arleady caught can't have a changed nature.
252 Speed 252 Sp. Attack 6 HP
252 Sp. Attack, 252 Speed, 6 HP
252: Speed 252 Attack 6 HP
EV's: 252 Sp. Attack, 252 Speed, 6 HP
I have room for one more.