Through sheer luck, I was able to beat the entire Sinnoh E4 with JUST my lvl 88 Magmortar... NO DAMAGE. In fact, nobody even landed a hit on me. It got a little close with Cynthia's Garchomp, but luckily, she used Dragon Rush, and it missed.
Anyone else beaten the E4 doing something cool? (No Max Stat Magikarp stories... again... >_>)
I've beaten the entire Sinnoh E4 with just my Darkrai, no damage. But I guess thats not surprising, Darkrai is awesome :P
I've done it with my Empoleon, Raquaza, Charizard, and I think Jirachi, each on their own :D