>>46190224>Gen 4Clefable was UU, though was really strong in OU due to Magic Guard ignoring paralysis and sneaky pebbles, letting it switch into everything that wasn't Infernape or Machamp
>Gen 5Clefable was RU, it was a certified shitmon since you could paralyze it again, and Fighting types were relevant in lower tiers as Close Combat and Superpower became more widespread
>Gen 6Clefable becomes the #1 Pokemon in OU for all of X/Y, only dropping off in ORAS due to Pokemon like Mega Metagross and Mega Medicham capable of busting it. Still a top 10 Pokemon
>Gen 7Falls off more, though still a top 20 Pokemon throughout the entire generation, even with absurd Pokemon like Toxapex, Magearna, Kartana, Pheromosa, Zygarde, Ash-Greninja, and the Tapus running around
>Gen 8#1 Pokemon in the tier for 90% of OU's existence. Absolutely busted, despite the fact that it would barely be UU if it were still Normal type.
Fairy made Clef too strong. It needs to be weak to Fire and/or Rock