Why is Stone Edge used over Rock Slide on DD Tyranitar?
Just an example in power difference:
- +1 Rock Slide v. 4 / 0 Heatran: 550 Atk vs 248 Def & 324 HP (75 Base Power): 178 - 211 (54.94% - 65.12%)
- +1 Stone Edge v. 4 / 0 Heatran: 550 Atk vs 248 Def & 324 HP (100 Base Power): 238 - 282 (73.46% - 87.04%)
Both are clean 2HKO's, although Rock Slide has a very small chance to 3HKO if Stealth Rock isn't up and Heatran has Leftovers, both of which are pretty hefty 'if's'.
Rock Slide still scores necessary KO's against super-effective targets:
- +1 Rock Slide v. 248 / 228 Bold Zapdos: 550 Atk vs 289 Def & 383 HP (75 Base Power): 306 - 362 (79.90% - 94.52%)
Always OHKOs with Stealth Rock.
- Rock Slide v. 0 / 4 Gyarados: 367 Atk vs 194 Def & 331 HP (75 Base Power): 306 - 362 (92.45% - 109.37%)
Always OHKOs with Stealth Rock, OHKOs 92.45% of the time without Stealth Rock.
- Rock Slide v. 156 / 96 Gyarados: 367 Atk vs 208 Def & 370 HP (75 Base Power): 288 - 338 (77.84% - 91.35%)
Always OHKOs with Stealth Rock.
- Rock Slide v. 0 / 4 Salamence: 367 Atk vs 197 Def & 331 HP (75 Base Power): 302 - 356 (91.24% - 107.55%)
Always OHKOs with Stealth Rock, OHKOs 79.49% of the time otherwise.
OHKOs 87.12% of the time with Stealth Rock.
Always OHKOs with Stealth Rock, OHKOs 79.49% of the time otherwise.
The selling points:
- Rock Slide has better accuracy than Stone Edge (90 : 80)
- Rock Slide has much more PP than Stone Edge's measly 8 (no more Pressure stall crap!)
So all in all, my simple question is: why do people use Stone Edge over Rock Slide on DDTar?
Analysis said:
(In Other Options)
Some people may use Rock Slide instead of Stone Edge because Stone Edge has such poor PP and accuracy. The problem with that is that you already have Crunch with more power and accuracy (and arguably a better side-effect, when you consider Tyranitar's low Speed) than Rock Slide. If you use Rock Slide, there are going to be very few situations in which you will find yourself using it. With Stone Edge, however, the increase in power can get you out of some tricky situations where Crunch / Rock Slide wouldn't do enough damage. It is a decent option on the DD set for the higher accuracy and the Choice Scarf sets for the flinch rate, but almost all the time you will find Stone Edge to be the superior option.
+1 Adamant Tyranitar vs...
(Stone Edge first, Rock Slide second)
Gliscor (252 HP/40 Def Impish)
604 Atk vs 325 Def & 354 HP (100 Base Power): 201 - 237 (56.78% - 66.95%)
(100% 2HKO w/ Left, 64% w/ Accuracy, no Sand Veil)
604 Atk vs 325 Def & 354 HP (75 Base Power): 151 - 178 (42.66% - 50.28%)
(33.27% 2HKO w/ SR/Left, 26.95% w/ Accuracy, no Sand Veil)
Gliscor can probably stall Stone Edge out with Roost regardless.
Forretress (252 HP/144 Def Relaxed)
604 Atk vs 387 Def & 354 HP (100 Base Power): 169 - 199 (47.74% - 56.21%)
(100% 2HKO w/ SR/Left)
604 Atk vs 387 Def & 354 HP (75 Base Power): 127 - 150 (35.88% - 42.37%)
(No 2HKO)
Fire Punch will OHKO but Stone Edge is much more useful with Aqua Tail.
Mamoswine (0 HP/4 Def Adamant)
604 Atk vs 197 Def & 361 HP (100 Base Power): 330 - 388 (91.41% - 107.48%)
(OHKO w/ SR)
604 Atk vs 197 Def & 361 HP (75 Base Power): 247 - 292 (68.42% - 80.89%)
(no OHKO for Rock Slide or Crunch)
604 Atk vs 197 Def & 361 HP (75 Base Power): 330 - 390 (91.41% - 108.03%)
(Fire Punch, OHKO w/ SR)
Aqua Tail will also OHKO.
Scizor (248 HP/0 Def Adamant)
604 Atk vs 236 Def & 343 HP (100 Base Power): 274 - 324 (79.88% - 94.46%)
(41.03% OHKO w/ SR)
604 Atk vs 236 Def & 343 HP (75 Base Power): 207 - 244 (60.35% - 71.14%)
(No OHKO without Spikes)
Again, Fire Punch will OHKO but Stone Edge is much better with Aqua Tail.
Skarmory (252 HP/176 Def Impish)
604 Atk vs 396 Def & 334 HP (100 Base Power): 165 - 195 (49.40% - 58.38%)
(2HKO w/ SR/Left)
604 Atk vs 396 Def & 334 HP (75 Base Power): 124 - 147 (37.13% - 44.01%)
(.07% 2HKO w/ Shed Shell and SR)
Fire Punch should do the same damage as Stone Edge.
Suicune (252 HP/252 Def Bold)
604 Atk vs 361 Def & 404 HP (100 Base Power): 180 - 213 (44.55% - 52.72%)
(80.08% 2HKO w/ SR/Left, 2HKO w/Sandstorm)
604 Atk vs 361 Def & 404 HP (75 Base Power): 135 - 160 (33.42% - 39.60%)
(No 2HKO)
This is probably the biggest drop in power. You never have a shot at 2HKOing with Rock Slide while it's guarenteed with Stone Edge and don't have any other moves to hit them harder.
Vaporeon (188 HP/252 Def Bold)
604 Atk vs 240 Def & 448 HP (100 Base Power): 271 - 319 (60.49% - 71.21%)
(2HKO, 64% w/ Accuracy)
604 Atk vs 240 Def & 448 HP (75 Base Power): 204 - 240 (45.54% - 53.57%)
(91.72% 2HKO w/ SR/Left, 2HKO w/Sandstorm)
604 Atk vs 240 Def & 448 HP (80 Base Power): 217 - 256 (48.44% - 57.14%)
(2HKO)
Crunch is your best bet regardless.
Gyarados (252 HP/252 Def Impish, Intimidate)
403 Atk vs 282 Def & 394 HP (100 Base Power): 308 - 366 (78.17% - 92.89%)
(OHKO w/SR)
403 Atk vs 282 Def & 394 HP (75 Base Power): 234 - 276 (59.39% - 70.05%)
I think there's a chance to OHKO with Rock Slide because of Sandstorm. This is also more common than Bulky Gyara.
Even if you did have the same 2HKO's, Stone Edge has 33.3% more power which means you have to do that much less damage to your counters to OHKO them.