Aether Nexus
Member
"I fall asleep to be awakened."
Posts: 62
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Post by Aether Nexus on Sept 19, 2010 3:02:46 GMT -8
So I've been messing around with RBY damage calculations over some time and have been wondering why the damage calculator's give me a # ~ # result.
For the hell of it, I just decided to do a quick no-brainer Pokemon vs. Pokemon, move X vs. Pokemon's Defense Y outcome. I went with Aerodactyl vs. Alakazam (as those are the first one's that come up alphabetically).
Test damage calculation (damage calculations are based on max stats vs. max stats -- legal stats, not 'hahaha 999 stats!!!'): Aerodactyl's Hyper Beam (308) vs. Alakazam (188 Defense -- no Reflect damage results; just straight Attack to Defense hit):
Marble Palace results: Non-CH: Max. 208/Avg. 192/Min. 177 CH: Max. 405/Avg. 374/Min. 344 Reflect: Max. 105/Avg. 97/Min. 89 (This has nothing to do with the calculation -- I just added it for the hell of it.)
NBS damage calculator: Damage: 177 ~ 208 Percentage: Between 56% and 66% damage
Now the main question is this: why does it give me a in-between X # and Y # results? So if I use Aerodactyl's Hyper Beam twice, will it not do 208 damage each time? So instead it's going to be doing somewhere between 177 to 208 damage even with maxed out stats? Or will the 208 damage always occur due to that being the max damage outcome due to my Aerodactyl having a max attack stat (308) vs. my opponents Alakazam's max Defense stat (188)?
~ Aether Nexus
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Post by coletrain on Sept 19, 2010 3:51:52 GMT -8
What it means is that there is a random element to how much each attack actually does. An attack can do from 85-100% of it's max damage, if I remember correctly.
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Post by t3h Icy on Sept 19, 2010 9:41:16 GMT -8
Yes, Coletrain is correct. All attacks at the end of the damage formula have X / 255, where X is a random number from 217 to 255.
If you were to lower the max stats of the Pokemon, the damage being dealt would decrease (both in the minimum and maximum obviously).
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Aether Nexus
Member
"I fall asleep to be awakened."
Posts: 62
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Post by Aether Nexus on Sept 20, 2010 0:05:20 GMT -8
Okay, understood. So let's say I was going to show calculations of damage done to X Pokemon from my Pokemon Y. If I was to show the damage calculations, I would put the minimum damage (lowest -- let's say 177 since that's how much Hyper Beam does to Alakazam with no Reflect up), and the maximum which is 208.
I shouldn't just put 208 because the damage that is done to Alakazam from my Aerodactyl's Hyper Beam isn't always going to be 208 each time, correct? So at times, what would look like a 2HKO could possibly be a 3HKO+ (depending on outcome).
~ Aether Nexus
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Post by coletrain on Sept 20, 2010 0:19:47 GMT -8
Yeah, that's right. Say an attack can 2HKO it's target, but isn't guaranteed, it needs the random number part of the formula (often called the damage roll) to be favourable. Otherwise, it only gets a 3HKO. I believe every number from 217-255 has equal chance of being selected, as such we can calculate how likely a 2HKO is in percent. But, it isn't as simple as this, because you have to take accuracy and crits into account.
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Post by t3h Icy on Sept 20, 2010 6:50:06 GMT -8
A good example is Zapdos's Thunder vs Starmie.
Starmie has 323 HP.
Thunderbolt: 285-243 (88%-75%) Thunder: 359-305 (111%-94%)
So while Thunder can save you another turn, you have a 30% chance of doing 0 (miss), and even a hit may not KO. Of the random part of the damage formula, 217 to 229 will not OHKO, while 230 to 255 will. In other words, a 26 in 39 chance, which is exactly 2/3.
So for Thunder to OHKO Starmie, you need to hit (70%) and get a decent damage roll (~67%), which in total means Thunder has a 46.6% chance to OHKO. However, should Thunder hit, do a low damage roll and score a Critical, that adds a possibility to OHKO. The chance for Thunder to hit (70%), a low damage roll (~33%)and a Critical (~19.5%) is 4.55%. So adding that brings Thunder to OHKO at 51.15% chance.
Thunderbolt will always 2HKO, but will OHKO if Zapdos gets a Critical (19.5%). So while Thunder has a 2.5x higher chance to OHKO, Thunder misses some of the time, while Thunderbolt is consistent. However, if Thunder does hit and doesn't OHKO, you can finish Starmie off with Thunderbolt, so you only have to risk Thunder once.
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Aether Nexus
Member
"I fall asleep to be awakened."
Posts: 62
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Post by Aether Nexus on Sept 20, 2010 14:37:53 GMT -8
Interesting. Thanks for the replies, fellas. It answers quite a bit of questions that were floating around in the ol' noggin.
~ Aether Nexus
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Post by WaterWizard on Sept 20, 2010 14:42:33 GMT -8
Thus, "ohh Max rolls! or "ughhh Min roll!"
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