When the Pokémon is not in combat, they are granted a shield that nullifies Sp. Atk damage equal to 9% of their max HP.
HP
18 -> 270 (lvl 20) Maximum Health Points.
Special Defense
0 -> 42 (lvl 20) Reduces incoming damage from special attacks.
Special Move Shield (Out of Combat)
9% -> 15% (lvl 20) When out of combat, gain a percentage of your maximum health as a shield that blocks special attacks.
How to get
Purchase from the item shop for 1000 Aeos Coins / 625 Aeos Tickets.