Once in my Platinum, I was at that double battle cafe place, and my Togepi use SACRED. FIRE. I was left with a drop-jaw espression on my face
And just yesterday (I had recently restarted my HG and SS) I was battling Whitney, and her clefairy uses metronome, and guess what comes out? ROAR. OF. TIME.
Sleek (My Sentret) had FULL HEALTH (About 50-60 at this point) and was left with 10 HP
I was like... no, words cannot describe this fail, but that Roar of Time cost me the win... Because her Miltank KO'ed Serenity (Chickorita) and Strat (Butterfree) and I had no Potions/Revives...
EDIT
I just battled her again, and all I have to say is, THIS CLEFAIRY HAS PROBLEMS!!!
It used OVER HEAT, DRACO METEOR, POISON FANG (And badly poisoned my Pkmn) AND POWDERED SNOW (And froze my Pkmn)