Clefable is just unfair, if its at full hp when sent out, theres nothing you can do to stop it.
http://replay.pokemonshowdown.com/ou-89315092
Where's the 'simple question' exactly?
Clefable is set-up fodder, taunt bait, and overall always begs for crits to happen. If it's Unaware, then Toxic/Taunt it. If it's Magic Guard, set-up or also taunt it. It's special attack isn't anything to write home about, either. It's extremely pHaze-able, too. Aegislash and Excadrill are both very solid checks and usually stop Clefable in its tracks.
And not to be a jerk or anything but you made lots, lots of misplays in that game lol
also:
252+ Atk Mold Breaker Excadrill Iron Head vs. +1 252 HP / 252+ Def Clefable: 174-206 (44.1 - 52.2%) -- guaranteed 3HKO after Leftovers recovery
next turn, if clef decides to use Cosmic Power again:
252+ Atk Mold Breaker Excadrill Iron Head vs. +2 252 HP / 252+ Def Clefable: 132-156 (33.5 - 39.5%) -- 13% chance to 3HKO after Leftovers recovery
and the 3rd turn:
252+ Atk Mold Breaker Excadrill Iron Head vs. +3 252 HP / 252+ Def Clefable: 104-126 (26.3 - 31.9%) -- 30.3% chance to 4HKO after Leftovers recovery
There's a 30% chance of flinching in all those 3 scenarios.
Aegislash:
4 Atk Aegislash-Blade Iron Head vs. 252 HP / 252+ Def Clefable: 218-258 (55.3 - 65.4%) -- guaranteed 2HKO after Leftovers recovery
4 Atk Aegislash-Blade Iron Head vs. +1 252 HP / 252+ Def Clefable: 146-174 (37 - 44.1%) -- 99.8% chance to 3HKO after Leftovers recovery
Bisharp:
252+ Atk Life Orb Bisharp Iron Head vs. 252 HP / 252+ Def Clefable: 320-377 (81.2 - 95.6%) -- guaranteed 2HKO after Leftovers recovery
252+ Atk Life Orb Bisharp Iron Head vs. +1 252 HP / 252+ Def Clefable: 213-252 (54 - 63.9%) -- guaranteed 2HKO after Leftovers recovery
That's on 252/252+ Clef, too. Idk what spread they usually use, but that's the worst case scenario.