>>18233436Not really, it makes for a good mixed Dragon Dancer. You also get improved bulk and aren't completely fucked over by Knock Off. And unlike every other DDer, it doesn't mind hazards and has above average speed without setting up, letting it function as a wallbreaking pivot mid-game, instead of being kept in reserve until it gets the chance to launch an end-game sweep.
>>18233488Mega Tyranitar has improved Physical bulk, and enough Speed to viably run Dragon Dance.
>>18233529It makes running bulky non-Mega Scizor completely obsolete. And considering that it has SD, Roost, and Defog (without being hazard weak itself), this is huge.
The correct answer is probably Mega Alakazam, in light of how good Magic Guard is and how situation Trace can be. And unlike Mega Latios, it's still too frail to even dream about taking a Knock Off. I would think that Mega Mewtwo X is also pretty bad, but I don't know enough about Ubers to say for sure.