Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
But aside that, I have two things I need to point out:
a) Bulldoze means wigglytuff was at -1 speed. This means snorlax is faster (not a common sight) and Iron Head may flinch.
b) Wigglytuff has competitive, which I obviously failed to consider when bulldoze was used. This means Wigglytuff had +2 SpA when focus blast was used, so snorlax has -4hp. Assuming the flinch doesn't happen.
Low Kick~Low Kick~Low Kick
If Counter, then use Stealth Rock the first instance, Substitute (15) for the second, and Synchronoise the third instance.
If Bide, then use Mimic (Bide) the first action, Double Team (2 Clones) the second action, and Focus Punch the third.
If Reflect is up on the opponent's side when you are to move, then use Brick Break that action.
Shadow Sneak - Shadow Sneak - Shadow Sneak
IF Normal Typed damaging priority attack A1 THEN Power Up Punch A1 IF Endure A1 THEN Bind A1 IF Damaging Priority COMBO A1 THEN Endure A1 and Shadow Sneak A2
Conkeldurr is back out. Sheer Force is on by default.
COMBO (Mach Punch + Poison Jab)*3
IF sucessful p/e THEN Chill and push back IF wigglytuff is underground when conkeldurr is to attack it THEN Earthquake IF Wigglytuff is on the semi-vulnerable state of bounce when conkeldurr is to attack it THEN Counter