This is topic Critical hits in forum Research Lab at The Azure Heights Forum.

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Posted by ThumbsOfSteel (Member # 1922) on 07-23-2001, 12:42 PM:
What causes them in both R/B/Y and G/S? My Alakazam in stadium got about 3 Criticals in a row against snorlax.

How to ruin a Snorlax:
defense curl

Posted by poccil (Member # 1457) on 07-23-2001, 01:03 PM:
Critical Hits in RBy are decided by a formula:

CH Number = int(int(int(S/2)*N)/256)
S = Pokémon's Base Speed
N = CH Modifier: N starts at 1. If you have used Focus Energy, divide N by 4.*
If you are using Karate Chop, Slash, Razor Leaf, or Crabhammer, multiply N by 4.

If a random number, from 0 to 256, is lower than the CH Number, the attack is a Critical Hit.
* It is known that Focus Energy reduces the chances of a Critical Hit. This has been fixed in Stadium (in which you should multiply, instead of divide, by 4)

In GS:


Calculation of Critical Hits is NOT based on Speed, as was the case in RBY.

A Critical Hit doubles the amount of damage done to the opponent by ignoring statistical modifications. During a Critical Hit:

  • If the Defense stat stage for either Pokemon is greater than 0, it temporarily becomes 0.
  • If the Attack stat stage for either Pokemon is less than 0, it temporarily becomes 0.

Determining Chances of a Critical Hit

A Critical Hit is based on value n and a random number. If the random number is less than n, then the attack is a Critical Hit. But how is n decided?

If Chansey is equipped with Lucky Punch, n=2. If Farfetch'd is equipped with Long Leek, n=2. If neither is true, n=0.
If Focus Energy has been used, then add 1 to n.
If the attack is Karate Chop/Razor Leaf/Crab Hammer/Slash/Aero Blast/Cross Chop, then add 2 to n.(Add 0 to n for any other attacks.)
If Scope Lens is equipped, add 1 to n.

After determining n, you'll get a Critical Hit (CH) number:

n CH Number
0 17
1 32
2 64
3 85
4 128

If the random number (from 1 to 256) is less than the CH Number, then the attack is a Critical Hit.

Igglybuff, that's what I mean for random numbers.
Peter Occil, in charge of The Ultimate Pokemon Center
Check out my Gold/Silver Guides!
Help me answer tough GS questions!

[This message has been edited by poccil (edited 07-23-2001).]

Posted by Igglybuff (Member # 1858) on 07-23-2001, 03:35 PM:
is thaty random number between 1 and 256?

"I will switch to... to... something." Part of message

Posted by raticata (Member # 1994) on 07-23-2001, 05:37 PM:
excellent - I'm just a bit fuzzy on

n CH Number
0 17
1 32
2 64
3 85
4 128

could you explain ? Ta.

As a result of this, I'm thinking about a farfetch'd with leek, slash, agility,swords' dance and baton pass.

what is the chance of a ffetch'd with


getting a critical hit ? thanks.

Whats the diff between roast beef and pea soup? You can roast beef.

Posted by Mu (Member # 28) on 07-27-2001, 09:13 AM:
About 50%

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