Actually, every steel in uu is demolished by specs focus blast so unless something like jirachi drops the only defensive Pokemon it can't beat are cresselia and SDef mew, the latter falling to draco meteor if SR and 1 layer on spikes are on the field.
Actually, when I said that I was specifically referring to Jirachi and specially defensive Metagross. But now that I had a chance to run some damage calcs, well...
252+ SpA Choice Specs Adaptability (custom) Draco Meteor vs. 252 HP / 80 SpD Cresselia: 284-336 (63.96 - 75.67%)
252+ SpA Choice Specs Adaptability Dragalge Draco Meteor vs. 252 HP / 160 SpD Metagross: 176-208 (48.35 - 57.14%)
252+ SpA Choice Specs Adaptability Dragalge Draco Meteor vs. 252 HP / 0 SpD Jirachi: 191-225 (47.27 - 55.69%)
Not even a bulky resist is going to want to tank that. It's so powerful, here's a quick comparison:
252 SpA Choice Specs Latios Draco Meteor vs. 252 HP / 236+ SpD Jirachi: 116-137
(28.71 - 33.91%)
252+ SpA Choice Specs Adaptability Dragalge Draco Meteor vs. 252 HP / 236+ SpD Jirachi: 139-164
(34.4 - 40.59%)
Obviously Fairies would try to switch in, but that's a
bit dangerous:
252+ SpA Choice Specs Adaptability Dragalge Sludge Wave vs. 248 HP / 216+ SpD Togekiss: 376-444 (100.8 - 119.03%) -- guaranteed OHKO
252+ SpA Choice Specs Adaptability Dragalge Sludge Wave vs. 252 HP / 252+ SpD Sylveon: 336-396 (85.27 - 100.5%) -- 81.25% chance to OHKO after Stealth Rock
252+ SpA Choice Specs Adaptability Dragalge Sludge Wave vs. 252 HP / 252+ SpD Florges: 296-352 (82.22 - 97.77%) -- 68.75% chance to OHKO after Stealth Rock
So yeah, just a
tad dangerous. Even the most specially defensive Fairy is likely OHKO'd by the wrong prediction.
Oh, and one for the lol-factor (since we now have the first and only Pokemon to be 4x weak to Poison):
252+ SpA Choice Specs Adaptability (custom) Sludge Wave vs. 252 HP / 4 SpD Whimsicott: 1408-1664
(434.56 - 513.58%)
Dragalge = nuke.