Speaking of Unfezant and its terrible abilities, that reminds me... Someone asked earlier in the thread that since Keen Eye was boosted from "Ignores Accuracy drops" to "Ignores Accuracy drops and the opponents' Evasion boosts", they wanted to know if the abilities Big Pecks and Hyper Cutter were similarly changed.
My test: Go out onto Route 12 and find a Pinsir with Hyper Cutter (much easier said than done). I brought my Mawile with Intimidate to check the abilities (not that I needed to, since if it had Mold Breaker, it would say so), and a Torkoal with Iron Defense.
During this battle, I did not to attack Pinsir (Revenge's damage is never boosted during this battle).
-Revenge, 7 damage
Iron Defense
-Brick Break, 5 damage
Iron Defense
-Revenge, 3 damage.
Iron Defense (now at max defense)
-Vital Throw, 2 damage.
-Revenge, 2 damage.
-Brick Break, 3 damage.
-Brick Break, 3 damage.
-Vital Throw, 2 damage.
-Revenge, 2 damage.
-Revenge, 2 damage.
She was never able to approach 7 or 5 damage again, so Hyper Cutter does not ignore the opponent's Defense boosts.
Now for Big Pecks. I brought a Fletchling into battle against a wild Honedge.
During this battle, I did not attack Honedge, and it never used Fury Cutter more than once at a time (Fury Cutter's damage is not boosted during this battle).
Swords Dance
-Fury Cutter, 5 damage.
-Tackle, 13 damage.
Swords Dance
-Tackle, 18 damage.
-Fury Cutter, 7 damage.
Swords Dance (now at max attack)
-Tackle, 23 damage.
-Tackle, 22 damage.
-Fury Cutter, 10 damage.
-Tackle, 25 damage.
-Fury Cutter, 10 damage.
Once again, Honedge did not drop as low as doing 5 or 13 damage like at the beginning of the battle. (I never saw its unboosted power, Swords Dance was the first move it used.)
So no, Big Pecks does not ignore the opponent's Attack boosts (which is disappointing, I thought that maybe they'd actually made it useful...).