>>56552205Arceus is never referred to as a god in the games, so yes, he isn't and that's a fan interpretation. Pokémon doesn't want to give its license a religious dimension.
On the contrary, Arceus is the creator of the Universe. Here, we have more of a personification of the beginning, or the Big Bang. That's why it's Pokémon Alpha, and why these myths and PLA's storyline are in line with that.