Blissey (F) @ Shed Shell
Ability: Wonder Guard
EVs: 248 HP / 252 Def / 252 SpD
IVs: 0 Atk / 0 Spe
- Baton Pass
Blissey as a counter.
Thanks to its high HP and Special Defense, Blissey can take several hits from Palkia before fainting. It can even survive Hydro Pump into Hydro Pump crit.
252 SpA Palkia Hydro Pump vs. 252 HP / 252+ SpD Blissey in Rain: 190-225 (26.6 - 31.5%) -- guaranteed 4HKO
252 SpA Palkia Hydro Pump vs. 252 HP / 252+ SpD Blissey in Rain on a critical hit: 382-450 (53.5 - 63%) -- guaranteed 2HKO
It can switch on Palkia and Wish stall it with Protect. This also helps the whole team by pp wasting Hydro Pump and also provides efficient Wish support thanks to Baton Pass. Toxic is to win the 1V1 vs Palkia and just annoy in general. Finally Shed Shell to avoid Shadow Tag. This could be changed for Leftovers potentially in order to check Palkia even better.