Rolls: 303, 10, 143, 419, 110, 58, 308, 544, 535, 170, 153, 77, 20, 101, 382, 155, 306, 8, 38, 377
Step One
Porygon2 used Snore!
Crit [1-25/600]: 303 (No)
Effect [1-180/600]: 10 (Yes)
Damage (Darmanitan): (5 + 3 + 8 - 1) + 4 = 19
Darmanitan: Flinching [Next 1 Turn]
Darmanitan flinched!
Darmanitan's Flinching ended!
Porygon2: -2 HP (Burn)
Porygon2: -3 HP (Poison)
Porygon2's Poison: +1 Dosage {5}
Step Two
Porygon2 used Tri Attack!
Crit [1-25/600]: 143 (No)
Effect [1-120/600]: 419 (No)
Damage (Darmanitan): (8 + 3 + 8 - 1) + 4 = 22
Darmanitan: Fainting