Kingdom Hearts Re:CoM - Larxene 2 With 1 Card

You have no idea how happy I am right now
Neither I nor seemingly anybody else on the internet have found a reliable method to dodge Larxene's lightning attack, so my strategy had to rely on being able to counter it as often as possible. If you stick relatively close to her, she'll always backflip before performing a knife throw, and you'll have enough time to dodge roll if she does a melee attack instead, or counter her lightning if she does that. You won't be able to counter lightning every time since she'll usually use it faster than you can reload, so dip into your Pluto cards when you need. It's best if the Pluto card is equal in value, since then Pluto won't come out and leave you open to a counterattack.
You'll probably notice I always attack by sleighting my single attack card. Turns out, if you sleight a single card, it will both give Sora back his freedom of movement and remove the card from play far sooner, letting you damage Larxene without putting yourself at risk of a counterattack. And there's a secret rule that you can never lose your last attack card, so if you sleight it, it will still be reloadable. This discovery is one of the main reasons this fight became possible, because without it I'd take too much damage getting counter-countered.
Otherwise you just need to dodge perfectly and hope you get good Friend card drops, saved for Phase 2. Triple Goofy is ideal, but I've had very close runs with only Double Goofy or Donalds. And of course, be very careful with the timing of the friend sleight. Larxene has a bunch of 0 cards in her deck, so use the sleight when she's low on cards (though be warned that once she actually starts reloading she'll go into dodge mode).

[@2CPhoenix]

You absolutely madlass

[@KainYusanagi]

Absolutely amazing.

[@StardustNovaChannel]

I thought you meant you beat her with one single card.

[@trueblue5691]

Amazing. Well done gamechamp