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Heh, are you sure it was me, cuz I think I avoided Seaking at all cost because it's such a horrible monster xD. I did play GSC, though, so I would be up for a battle! I'll VM you when I will be available on netbattle, monster.
A Modest Porygon 2 untouched, a fully EV'd, fully trained Aerodactyl or a fully EV'd, fully trained Gengar. The aero is Jolly, the Gengar is Hasty. The Gengar was the in-game trained one.