→Relationship with Trainers
Strangely enough, a Shadow Pokémon that isn't under the care of the player will not enter Hyper Mode / Reverse Mode or apparently reduce its Heart Gauge, although a Shadow Pokémon the player controls will purify itself just by being in the Trainer's party.
An important difference between Colosseum and XD is the number of Shadow Pokémon each Cipher member carries: in Colosseum, each NPC Trainer only carries one at a time; in XD there are many Trainers with two or more Shadow Pokémon in their team, the first one being encountered at the [[Cipher Key Lair]], and the final boss of the game has seven Shadow Pokémon under his care. This may be a result of the large number of Shadow Pokémon in XD.
==Gameplay differences between Shadow and non-Shadow Pokémon==