2nd Emerald Update!
Continued speeding through the game, eventually getting to Slateport. From then proceeded, cleared all the trainers I could until now, got myself an Illumise (named Firefly), and gave it an Exp. Share I had gotten from the president of Devon. Wattson was next, and he wasn't going to be easy. Multiple attempts proved me right. I had to come up with a better strategy than just all-out-attacking. Firefly had gotten to level 22 by the time, but it was still weak. It is, indeed, a weak pokemon. And Seasight was 4x weak to Shock Wave, so sending him in would be completely pointless. That said, I could only rely on Hunter for damage. However, that didn't mean that Firefly couldn't take its part...
I equipped Chesto Berries in everyone. With all the Shock Waves coming left and right, paralyz healing would come in handy. I also bought 2 X Speeds, and 1 Dire Hit, as well as Super Potions and Paralyz Heals.
I leaded with Firefly. 3 Charms on the Voltorb make sure his Selfdestruct won't do much. One Moonlight to heal the taken damage, one Wish for the following turn, and a switch. Hunter took a Shock Wave, but got immedeatly healed by the Wish.
Time to set-up. One Mud-Sport assured more endurance for my team members. X Speed and X Attak on Hunter, as well as Dire Hit. Headbut away. Next came Electrike, who faced the same fate.
Then came Magneton. I Tail Whip'd him 6 times, while healing both damage and paralyz from Shock Wave, Sonic Boom, and Thunder Wave. Then I headbut'd him and the following Magnetric, thus emerging victorious of a tough battle.
Seasight, the Wingull (Must learn Shock Wave and can only evolve after Flannery.)
Modest Nature
Level 24
~ Water Gun
~ Wing Attack
~ Super Sonic
~ Shock Wave
Hunter, the Zigzagoon (Can only evolve after learning Flail. Must keep Flail at all times.)
Careful Nature
Level 26
~ Headbutt
~ Pin Missile
~ Tail Whip
~ Mud Sport
Firefly, the Illumise (Can't learn TMs)
Gentle Nature
Level 24 @ Exp. Share
~ Quick Attack
~ Charm
~ Moonlight
~ Wish
Oh, and I got PokéRus on all my pokes! First time this has ever happened to me! :)