The first time I played Emerald, Norman, Wattson and the Psychic Twins o' Mossdeep kicked my butt from one end of the game to the other. The second time around, I had Combusken, Lairon and Mightyena, and they didn't stand a chance. And I had a Raichu on my team to help against Wallace during the E4. :>
The Psychic Twins are still the most annoying to me, though. :x I hate Claydols now. XD