In order to receive the Secret Sword, the user must have a Cobalt Épée, Terracotta Épée, Viridian Épée, and Apprentice's Épée Summon Item in their inventory.
Keldeo, Terrakion, Cobalion and Virizion must also be present in the party. The four items can then be traded for the Secret Sword.
- Note: The four Summon Items used will be lost. The Pokémon will remain in your party.