>>30897758Cute Charm chain. You have a much higher chance of the incoming Salandit to be female, plus after the chain goes over 30 (but before 255), you're guaranteed 4 perfect IVs.
Only trouble is that none of the Pokemon who have Cute Charm can learn False Swipe, and they're all Fairy type, meaning Salandit's poison attack is super effective and has a better chance of poisoning.
So here's my tip:
1) Get a male Sylveon. It's very likely to have Cute Charm.
2) Raise the Sylveon to about level 50, so it can last longer in the battle.
3) Get another Pokemon who can learn False Swipe and some other move that can either paralyze or induce sleep.
4) Grow as many Leppa Berries, Pecha Berries, Rawst Berries, and Sitrus Berries as possible. Give Sylveon a Pecha Berry to hold.
5) Max out Sylveon's affection. This makes him more likely to shake off burns and poison without using up a turn.
6) Buy a whole bunch of your standard recovery items and an Adrenaline Orb.
7) Turn off battle animations. They make the whole thing last much longer.
From there, you go to the Volcano Park or Route 8 with Sylveon in the lead, and find a Salandit. Switch to your second Pokemon, use False Swipe, back to Sylveon, drop the Orb. In my personal recommendation, knock out 20 Salandit before getting rid of the first one. Use any moments where calling for help fails to restore health, status, or PP.