Zee hung his head slightly before turning to Oak "well, long story short is that we were a guild. People who go out and rescue pokemon, solve problems, catch criminals and the like. We were headed by Lucario, Gardevoir, and Umbreon, who betrayed us. He started to kill pokemon with an artifact he stole to gain the're powers. We had a similar stone but it would kill him should he try to steal our souls, he did and died, locking us in the soul stone until we were freed recently" he stopped and looked over to Izumi
"and it seems it was adverse to some of our members mental health" he rumbled angrily at the Squirtle