That reminds me of another tale (gather 'round children). I was on Battle Revolution one fine day and thought of the absolutely spiffing idea (OK, I'll cut that out now) of battling someone online with my non-legendary team. I found someone who had a nice team of Rayquaza, Darkrai, Groudon, Giratina, Dialga and Latias, all of which were of course "sav'd" (Pokésav enhanced). IIRC, I had Pachirsu (awww), Gallade, Garchomp, Rotom, Yanmega and Typhlosion. He sent out Rayquaza and I sent out Pachirisu (here we go).
Rayquaza used Dragon Rush! (can tell it's cheated now)...Missed!
Pachirisu used Charge!
Rayquaza used Dragon Rush!...Missed!
Pachirsu used Thunderbolt! Got him down to about the start of the yellow zone.
Rayquaza used Dragon Rush!...Missed!
Pachirisu used Thunderbolt! A Critical Hit! Got him to the red zone.
Rayquaza used Dragon Rush!...Missed!
Pachirisu used Quick Attack! BAM!
Rayquaza fainted!
Pachirisu fainted at the hands of Groudon, but I destroyed his team overall...a lesson has been learned here: NEVER use blatantly Pokésav'd Pokémon!
Come to think of it, I can't remember the last time I actually used legendaries when fighting against someone :P