I don't beleive in creationism. Mew is the ancestor of Arceus. There is no evidence to suggest Arceus is God - it has the most power, but it's not God, that's just what the ancient people say. Nobody saw Arceus's birth, so they just made it up.
A little kid with 6 pokemon can defeat a massive corporation with armies of pokemon because it's not the people that decide the outcome. If people could only get anywhere using hyper-sentient beings, it would be those beings that decide.