>>27089520Only when they're at full capacity and you link with a new one. At the end of the battle, a screen with that warrior will appear and it'll make you choose one of the Pokémon there to drop.
I know it's retarded but only that. That's why I went autistically in every side chapter for only stick with Warriors that were near of the first castle. Thanks to that, every registered Warrior only has their first Pokémon and their perfect link.
But for some Important Warriors, I'll make them link with other Pokémon sometimes; like Masamune with a Gyarados or the Water Warlord with a Lapras/Walrein.