Let's see what I can dig up over watching a few battles...
- Electivire.
- Weakness Policy Golem.
- A special Tyranitar with Dark Pulse. It was totally walled by a Sitrus Berry Florges.
- A Tyranitar with Smooth Rock. It had Excadrill as its partner...by which I mean Mold Breaker Excadrill, and nothing else that could conceivably take advantage of sand.
-
Arcanine TWO Arcanines.
- Toxic Spikes Scolipede, set up while the opponent's Venusaur was still alive...and what does said Scolipede user switch into? Starmie.
- Leftovers Scyther with Brick Break and Tailwind.
- Dark Pulse / Confuse Ray / Foul Play / Sludge Bomb Gengar. It won the game.
- Lead Smeargle without Focus Sash.
- Dusclops.
- Ninjask.
- Torterra.
- Buizel.
- Flame Body Talonflame. It burned a Scizor, opponent caught on, and set up on Talonflame with a Scolipede for a swift ragequit.
- A player mashing the timer button, resulting in turning the timer off repeatedly and resetting it, then ragequitting on an AFK opponent.
- Mega Aerodactyl with Rock Slide / Dragon Pulse / Sky Attack / unknown. Also the player using said Mega Aerodactyl had a Charizard.
- Said Charizard was a specially-based set that had Sunny Day. At least it had Solar Power, but even then it was badly underpowered enough that I suspect no SpA EVs.
- Ambipom.
- Night Slash Gliscor...which also had Knock Off.
- Mega Punch Shell Bell Snorlax.
- Psychic Shell Bell Metagross.
- Draco Meteor Garchomp.
- Hidden Power Electric on Greninja. It used it on a Swampert.
- Mega Gardevoir with Dazzling Gleam / Hypnosis / Nightmare.
- Hyper Beam Magmortar.
- Giga Impact Hydreigon.
- And because I saved the best for last:
this monstrosity.