Discussion Which Pokémon came first: Mew or Arceus?

[Nightrider]

There has been a debate about Mew and Arceus since the introduction of Arceus; which one came first? Because we are told that Mew is the ancestor of all Pokémon, and Arceus is a Pokémon; but also it was implied that Arceus created everything, and Mew is a thing. Many people say Arceus is an exception and Mew is the ancestor of regular Pokémon only.

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/u/Karmo_ said:
Personally, I've mostly gone with the Arceus we can see or catch being an avatar or vessel instead of the actual god and that Mew could've been the first successful attempt to make a living creature, including even before it's own body, thus allowing Mew to be the ancestor/genetic blueprint to all pokemon (including the pokemon Arceus) while the actual god Arceus still came before it. It also helps that Mew has a really simple design, good for when your trying to get things functional rather than fancy, at least at first.

/u/nitsunekoni said:
If Mew and Arceus are the first two Pokémon, than this means they both preceed Dialga, which also means they both preceed time as we know it. Time as we know it is linear, so we have the concepts of "before" and "after". But Arceus and Mew might have existed in a non-linear time, before Dialga. So they might be created in a different casuality than we got used to.

This makes something like this possible:

Mew gave birth to the egg that Arceus hatched from, and Arceus created Mew. Neither of them are first or second, but both of them are first and second.

I know this doesn't make much sense, but the fact that it doesn't make sense also makes sense, because they also preceed human comprehension.