>>56791256Regignosisbro, the giants in the lore are specifically stated to not be Pokémon. They fought Aus, lost, died and then their remains were covered with Aus' blood from which Pokémon sprung forth.
Now, can I believe that the Regis are the closest *Pokémon* to the giants of old? Sure, but Gigas isn't one of the original giants. At best he's what resulted from their bodies combining with the divine blood.
It may seem pedantic, but that's an important distinction that, while doesn't change the overall direction of your cult's lore, it does change a couple key points that should be considered.