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assuming clefable is turning into fairy, and implying his magic guard one can put it back into OU very easily, I mean, clafable is very versatile and fairy typing gives a nice set of advantages linked to normal type.
For instance:
>the life orb and the neutrality to fighting (due the fairy type+normal type);
>the 2 immunities (ghost+dragon);
>the immunities to entry hazards and life orb damage (due magic guard);
>possible immunity to status (if rolling a flame/toxic orb).