Originally Posted by Fat MariaMoments
The set I've been running into most often, and the one that has given me the most trouble, has been the Drain Punch set.
Ability: Iron Fist / Guts
EVs: 252 Atk / 252 SpD / 4 Def
- Drain Punch
- Bulk Up
- Mach Punch
Iron Fist is preferred, but Guts will do until DW Roopushin is released. Guts definitely has its upsides too though, since this Roopushin an ideal Burn target. After a Bulk Up, this monster is pretty much impossible to OHKO without a STAB SE attack. Neither Psychic or Flying attacks have traditionally been all that common, and that trend hasn't seemed to change from the limited playtime I had on PO. Sure, you COULD 2HKO this thing with any moderately powerful special attack, but that's easier said than done when its Drain Punches heal huge amounts of HP.
I was running Modest offensive LO Cune against it, and those calcs look like this:
With Surf- 306 Atk (95 BP, STAB) vs 229 Def (320 HP) * 1.30: 178 - 210 (55.63% - 65.63%)
With Hydro Pump- 306 Atk (120 BP, STAB) vs 229 Def (320 HP) * 1.30: 223 - 264 (69.69% - 82.50%)
Meanwhile, +1 Roopushin is hitting back equally hard, but healing half of all the damage Suicune did:
With Guts- 511 Atk (75 BP, STAB) vs 235 Def (311 HP): 175 - 207 (56.27% - 66.56%)
With Iron Fist- 511 Atk (90 BP, STAB) vs 235 Def (311 HP): 211 - 249 (67.85% - 80.06%)
It's healing over 100 HP a shot against Suicune, and even more against things with frailer defenses. If Suicune eats a Drain Punch on the switch, it loses the fight and Roopushin walks away with ~70% of its HP intact. Even if Suicune comes in on a Bulk Up, it cannot 2HKO with Surf, and it needs to hit with both Hydro Pumps to 2HKO.
Maybe Suicune is a somewhat arbitrary choice, but I don't imagine many other special attackers faring much better without SE STAB attacks. Its naturally high Def with Bulk Up means that physical attackers fare even worse, obviously. You can't set up against it because it 2HKOs pretty much everything, and it will fully heal itself in the process. Frail pokemon that aim for a speedy kill/status (Doryuuzu, Breloom, Alakazam, etc) just get Mach Punched to death.
I'm also tempted to try a Burn Orb w/ Guts, though I'm not sure if the extra damage/healing is worth giving up Leftovers.