Yay only Ground/Psychic type! This thing is just a big clump of floating dirt with a bad case of pinkeye. It bugs me when I can't imagine much variety in sprites for a pokemon, and there's not with Claydol, just look a them...
Pokemon without a face or limbs just kind of suck, there's no personality in there. It's in the UU tier probably more due to Stealth Rock and Dual Screens than anything else, which there are better options for. It may be the only Ground/Psychic type for now, but I'd love to see better one later.
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http://i.imgur.com/Aj7qk.gif