Guys, what if Gardevoir learned Boomburst ? 140 BP 100 accuracy fairy stab with no drawback. Pretty scary. Also, if, say, Porygon-Z learns it...damn. 280 Bp coming from a 135 SpA stat. The agility set would become really really threatening. It's quite unlikely to happen but it would be funny.
Slaking could also become a threatening mixed sweeper.
Now, another Pokemon that will benefit this move is Exploud. Yeah it is shit atm but I'm mentionning it because, for anything else it's pure speculation, but Exploud is very likely to have this move. But then again Snorlax doesn't learn Slack Off, so...
Basically every pokemon that learns hyper voice have a chance to learn boomburst. Again, I'm really expecting Gardevoir to have it, I mean Nintendo didn't give it Pixilate for nothing.
Also, Rock Tomb becomes usable now, pretty gimmicky on anything else than Breloom but now there can be some reason to use it.
The Thief buff is nice, as almost every technician user can learn it.
As for the new moves, Power-Up punch seems interesting to me. Like, it would be a good move on Breloom if it learns it don't you think ? Yeah it only boosts attack by one stage but it's actually powerful when boosted by Stab and technician. As much as Scizor's bullet punch. A scarf Breloom could make a good use of it.
Mystical Fire could also be a very good option on any specially defensive, or even physically defensive pokemon.
Also, this move :
Topsy-Turvy
20--100All stat changes affecting the target turn topsy-turvy and become the opposite of what they were.
If it instantly turns like a +2 boost into a -2, this is just amazing. Plus it bypasses taunt AND have perfect accuracy. Just imagine the face of the opponent when you hit his/her +4 Atk/Def Snorlax with it. And then you pursuit lol. Priceless. (Situationnal, but this would be so epic)
Actually at least half of the new moves can be very interesting depending on additional informations and details, distribution etc. Really looking forward to competitive Gen VI play !