Sorry if this is reviving, but I have actually played an Unlimited deck at league during Worlds and stuff with Claydol in as a tech for consistency. There was no point in playing HGSS-on, but Dragons Exhalted hadn't came out yet, so I thought I'd just play around with some of the older sets. My deck outsped so many other decks with an effortless T1 60; I actually found people were Catchering Claydol just to stall. I beat MonoTerrakion and a pretty good Eels list with a bunch of Stage 1, 100 HP ex's, each with a different type. It looked really horrible on paper, but because of Claydol, I was able to constantly have exactly what I needed in my hand. I think if Claydol were in format, It would give a lot of the tier 2 decks and rouge ideas a shot at tier 1, or at least first place at several events. Just my thoughts, though.