It's possible, although extremely improbable given the math. A 0 IV/0 EV neutral nature Politoed with crit/rain/stab/LO boosted Hydro Pump does 53.4% - 63.1% to a 252 HP/252 SpD Calm Cresselia (which is a tiny bit bulkier (120HP/130SpD) than any potential Sylveon stat spread anyone has guessed for this).
The only way this could be possible is if that Politoed is built almost as bad as it could be and the Sylveon is built very close to as bulky as it can possibly be. It's quite a stretch, however not impossible.
The only way this could be possible is if that Politoed is built almost as bad as it could be and the Sylveon is built very close to as bulky as it can possibly be. It's quite a stretch, however not impossible.