Was doing a random battle on Wi-Fi when I got owned by a Lv1 Aron. Yes...a level one Aron. Apparently, if Tyranitar or Hippowdon induces a sandstorm, Aron has the ability Sturdy, Leftovers, the move Endeavor, and one more attacking move, your finished. The sandstorm is to finish you off after it Endeavors. But don't fret, if you've managed to face it with a Pokemon immune to Sandstorm damage, Tackle or some other move will finish you off. Utterly ridiculous. >:(
Ever heard of something called Double Kick or Triple Kick?
For God's sake, I think you haven't.