Cacturne @ Life orb
Ability: Water absorb
EVs: 236 Atk / 224 Sp. Atk / 48 Spd
Naughty nature
-Sucker Punch
-Dark Pulse
-Giga Drain
-Hidden power (fire)
At first glance Cacturne may seem like an inferior Shiftry. However it is so much more than that.
Looking at Cacturne's stats, one may look at it's offensive stats: 115 Attack and an equal Special Attack to boast. Why is it in NU then you may ask? 55 Speed. The 48 Spd is to outspeed 0spd Weezing.
This, however is mitigated by Cacturne's Sucker Punch coming off that skyhigh attack whis is in turn boosted by Life orb.
This set also lures in common physical walls, such as Steelix ( lol ), Granbull, Vileplume or Ferroseed, all of which promply get 2HKO'd, as the following calcs prove.
224 SpA Life Orb Cacturne Dark Pulse vs. 252 HP / 4 SpD Vileplume: 165-196 (46.6 - 55.3%) -- 99.6% chance to 2HKO after Stealth Rock and Black Sludge recovery
224 SpA Life Orb Cacturne Giga Drain vs. 252 HP / 4 SpD Granbull: 216-255 (56.2 - 66.4%) -- guaranteed 2HKO after Leftovers recovery
224 SpA Life Orb Cacturne Dark Pulse vs. 252 HP / 0 SpD Steelix: 218-257 (61.5 - 72.5%) -- guaranteed 2HKO after Leftovers recovery
224 SpA Life Orb Cacturne Hidden Power Fire vs. 252 HP / 228 SpD Eviolite Ferroseed: 182-218 (62.3 - 74.6%) -- guaranteed 2HKO
Those are just some walls that came to mind, feel free to request more calcs.
Next, it's ability to check the tier's versatile and/or incredibly powerful attackers.
236+ Atk Life Orb Cacturne Sucker Punch vs. 4 HP / 0 Def Typhlosion: 208-246 (69.7 - 82.5%) -- 56.3% chance to OHKO after Stealth Rock
236+ Atk Life Orb Cacturne Sucker Punch vs. 4 HP / 0 Def Magmortar: 235-278 (80.4 - 95.2%) -- guaranteed OHKO after Stealth Rock
236+ Atk Life Orb Cacturne Sucker Punch vs. 4 HP / 0 Def Electivire: 235-278 (80.4 - 95.2%) -- 50% chance to OHKO after Stealth Rock
236+ Atk Life Orb Cacturne Sucker Punch vs. 4 HP / 0 Def Pyroar: 222-263 (70.7 - 83.7%) -- 62.5% chance to OHKO after Stealth Rock
236+ Atk Life Orb Cacturne Sucker Punch vs. 0 HP / 0 Def Archeops: 242-285 (83.1 - 97.9%) -- guaranteed OHKO after Stealth Rock
Please not that because Cacturne has Water Absorb, Feraligatr is forced to use it's coverage move and Cacturne WILL get the Sucker Punch off. Or you could play mindgames and Giga Drain.
236+ Atk Life Orb Cacturne Sucker Punch vs. 4 HP / 0 Def Feraligatr: 169-200 (54.1 - 64.1%) -- guaranteed 2HKO after Stealth Rock
I think that that wall of calcs proves a point.
There are some checks to Cacturne, of course. Gurdurr can check, but cannot come in on Giga Drain twice.
224 SpA Life Orb Cacturne Giga Drain vs. 252 HP / 4 SpD Eviolite Gurdurr: 165-195 (44.1 - 52.1%) -- 75.8% chance to 2HKO after Stealth Rock
Dragalge can roast poor cactus with it's Poison STAB:
236+ Atk Life Orb Cacturne Sucker Punch vs. 252 HP / 0 Def Dragalge: 187-220 (55.9 - 65.8%) -- guaranteed 2HKO after Stealth Rock and Black Sludge recovery
I think everyone should give this spooky cactus a try!