dice are d600, roll low to hit/crit/effect, roll high for multi hit

Step 1:

iron head
-3 en
53 crit no
18 flinch yes
(8 + 7 +3 - 5) * 2 = 26 damage

weak pol triggers! +2 atk , +2 spA(4t)

flinched!
Step 2:

flash cannon
-3 en
322 crit no
473 effect no
(8 + 8 +3 - 7) * 2 = 24 damage

avalanche
-3 en
(12 + 6 + 3 - 7) + 8 = 22 damage
Step 3:

flash cannon
-3 en
176 crit no
164 effect no
(8 + 8 +3 - 7) * 2 = 24 damage

avalanche
-3 en
(12 + 6 + 3 - 7) + 8 = 22 damage