MountainDrew, He was playing Darkrai/Garbodor. It's hard to tell what's so good about it, but hey, it seemed to work for him. He also drew dead in a lot of his games, so I'd imagine he had to cut back on a lot of Supporters.
Yeah, I don't know of Gold Potion is all that good anymore. I don't think I got Turn 2 Night Spear once in the tournament (I think I got a couple Turn 2 Mind Jacks, though), and if you have to Juniper it away, you're kind of forced to Junk Hunt it back, or you're at a disadvantage. Your Blastoise win ratio also drops like a rock without Computer Search or Dowsing Machine.