I'm not sure if this counts, but my second battle of my first attempt of a 200-consecutive-win Battle Maison run. My team is a Mega Mawile, a ScarfChomp (with Adamant instead of Jolly), and a Bulky Rotom-W. After the opponent lucked their way into crits that took out my Mawile, and had a Walrein that countered and dropped my Garchomp as their last pokemon, Rotom came out. Rotom-W vs. Walrein. I should have won easily, right? Except due to two misses from Garchomp's Stone Edge, he had amassed two stacks of Stockpile and did a third on Rotom's first attack. I Thunderbolted him down to 25% hp, and Walrein Chesto-Rested to full hp. Then the battle began: Thunderbolt only did 25% of his hp per hit, and every 3 turns he'd wake up and immediately heal back up with another Rest. And he was Snoring (for minimal damage, but still enough to outdo Leftovers if he snored multiple times in a row). So essentially I was Thunderbolting, praying for a crit. No crit after 15 Thunderbolts, and I ran out of PP. Started throwing out Shadow Balls, first one crits to rub it in, but they do minimal damage as Rotom-W gains no STAB from them. This continues until I'm out of Shadow Balls, but luckily of the 15, 4 reduced his SpDef. Now I'm stuck Hydro Pumping a bulky Water-type, but thanks to the Shadow Balls lowering his SpDef, I can kill him in 3. Problem is, it's 70% accurate and I only have 5. First one hits, he wakes up. Second one misses, he rests. The rest hit, Walrein goes down, and I feel so much better. That Walrein was a hell of a mountain. And now, rage. And then, 52 wins later, my luck turns. Horribly. This next trainer has a Jynx first. I send out Mawile, Mega-Evolve, and use Swords Dance. Jynx uses Hail. I queue up Iron Head, but get put to sleep with Lovely Kiss. By the time I've woken up, I've taken one Blizzard and Hail has stopped. About to use Iron Head again, put to sleep again with Lovely Kiss. I wake up next turn, queue up Iron Head once more, GET FROZEN BY BLIZZARD. I figure I'm dead if I don't thaw out, I hit Sucker Punch, don't thaw, and die to another Blizzard. Garchomp comes out, 1-shots Jynx with Stone Edge, and Espeon comes out. I swap out to Rotom-W, he takes one Psychic. He uses Shadow Ball (drops Espeon down to ~40%) and goes down to another Psychic. Garchomp comes out, and I'm stuck with a dilemma: any of my attacks will drop Espeon, but I don't know who his third pokemon is and I have a Choice Scarf with no other remaining pokemon to swap into. Whichever move I choose, I'm stuck with. Opting for a STAB, I go with Dragon Claw (I had forgotten to breed Outrage before IV-breeding) believing the next pokemon could easily be Flying or have Levitate and thus being immune to Earthquake. The next pokemon is Metagross, and I die in 3 Meteor Mashes. Lovely Kiss hitting once has a 75% chance. It hitting twice has a 56% chance. Lovely Kiss hitting twice, then Blizzard hitting without Hail has a 39% chance. Lovely Kiss hitting twice, Blizzard hitting without Hail, and then Blizzard freezing, has a 4% chance. Lovely Kiss hitting twice, Blizzard hitting without Hail, Blizzard freezing, and then not thawing out on the first turn has a 3% chance. Lovely Kiss hitting twice, Blizzard hitting without Hail, Blizzard freezing, not thawing out on the first turn, and then Blizzard hitting again without Hail has a 2.205% chance. I lost at 52 wins because of a series of events that only had a 2.205% chance of occurring.