I've beaten a large majority of tournament decks: Monarchs, Burn, Inferno, Uria/Raviel/Hamahn, Exodia (A real pain in the butt >_<), Ancient Gears when they were half of a threat....The days....
And Porg, I can pull the 1-hit KO in a variety of ways, though my favorite is this...
Batteryman Micro-Cell face down, one face down spell, 1 card in my hand.Either they attack, or it gets flipped my turn. Either way, the flip effect lets me play one Batteryman with 1000 Attack or less from my deck or hand.
I choose AA
I chain it with Inferno Reckless Summon, and summon two more from my hand, deck, or graveyard, and they do the same for one of their monsters. Then, on my turn...
Short Circuit. So long as I have at least 3 Batterymen, I blow up everything on their field AT THE SAME TIME. Meaning there isn't much room for chaining there. Then they get hit for 9,000.
I know that move can be countered, and you'll say that's IF I get the right cards....Trust me, there are about 26 opportunities out of 42 to pull that move.
Second, I know it seems cheap, but think about this: Few people use Batterymen. Even fewer use them effectively. I'm one of those people. I practiced, and I know what to do, and when.
Sure, I'll go find my deck.