A = Attacker’s Level
B = Attacker’s Attack or Special Attack (Depending on type of attack)
C = Strength of Attack
D = Defender’s Defense or Special Defence (Depending on
type of attack)
X = 1.5 if type of attack matches attacker’s type,
otherwise X = 1 (STAB)
Y = 20 if defender is weak to attack
5 if defender is resistant to attack
0 if attack has no effect on defender
(i.e. normal attack on ghost)
10 in all other cases
Z = Random number from 217 to 255
Important note about the formula, sections enclosed
in []’s must have normal mathmatetical rules run within them, but the
final value must be rounded down to the closest integer.
So: [2 x 2 / 5 + 2] becomes [2.8] which then
becomes 2 before you can proceed with the rest of the formula.
A full example:
My Level 2 Rattata with an attack of 12, uses
Tackle (Strength 35) against a Pidgey (Defense of 15). The Random
number for Z was 223...
[[[[[[2 x 2 / 5 + 2] x 12 x 35 / 15] / 50] + 2] x 1 x
10 / 10] x 223 / 255]
[[[[[[2.8] x 12 x 35 / 15] / 50] + 2] x 1 x 10 / 10]
x 223 / 255]
[[[[[2 x 12 x 35 / 15] / 50] + 2] x 1 x 10 / 10] x
223 / 255]
[[[[[56] / 50] + 2] x 1 x 10 / 10] x 223 / 255]
[[[[1.12] + 2] x 1 x 10 / 10] x 223 / 255]
[[[1 + 2] x 1 x 10 / 10] x 223 / 255]
[[3 x 1 x 10 / 10] x 223 / 255]
[[3] x 223 / 255]
[3 x 223 / 255]
[2.6235294118]
2
So my Rattata did 2 damage.