Not me. I didn't use any special one-hit kill attacks or all lucky sevens. I fought emerald the long way. It was a hairy battle even with KOTR, everybody at max stats, and a minimum of material equipped. Dude, emerald gets like five attacks in a row. Those attacks damage both your MP and your HP and they do a lot of damage. I must've been doing something wrong but it seemed like I had made every preparation in the book. That guy is one tough bastard.