So i have been skimming the forums and i have noticed that people are debating who came first Arceus or Mew, Since Arceus is consider the god of pokemon, and Mew is consider the ancestor of all pokemon,so i thought i share my views on this.
Lets Look at their Pokedex entries first, Mews Silver pokedex entry states "Its DNA is said to contain the genetic codes of all Pokémon, so it can use all kinds of techniques." Take note it does not say that Mew created the other pokemon,but has the genetic codes of all pokemon.
Now lets look at Arceus from Pokemon X, "According to the legends of Sinnoh, this Pokémon emerged from an egg and shaped all there is in this world." Now many people will state that since it emerged from the egg this proves Mew came first, but does it really? Lets look at it this way, lets say the egg had always been their,which you could say isn't possible but that would also be stating it wouldn't be possible for Mew to always be their. Lets say Arceus hatched and he created the universe and everything,and then he made the world of pokemon, from here people who believe Arceus came first think he went ahead and made Mew and everything,but lets not forget Palkia, dialga, and Giratine.
Arceus is consider the trio master of the creation trio and the lake guardians(more on them later) The creation trio was made after Arceus created the universe with Palkia the Master of Space, Dialga the Master of Time, and Giratina the Master of Antimatter. Now you might be wondering why i am pointing this out but it is stated he made them right after he created the universe, if he did this why did he give Mew all the genetics of pokemon and not these guys? It is also stated he created the lake guardians who represent spirit before he fell into eternal slumber, with this in mind we can assume he made these guys last so they could, along with the creation trio keep the world in balance so he could fall into his eternal slumber.
Now lets Look at Mew the pokedex entries he has all state he has all the genetics of pokemon, would this also mean Arceus genetics? Why would Arceus give Mew his genetics as well since their would be risk Mew could use it to overthrow Arceus, which may sound stupid, but look at Giratina he was banished because of his violence so it's not like that couldn't have happened.
Lets look at the evil teams, Team Rocket was able to clone Mew Creating Mewtwo but when team Galactic tried to call and control the creation trio they failed, if Mew was the first pokemon out their then how could a evil organization be able to capture and clone him, but not the creation trio? One would assume Mew Would make all the pokemon weaker than him, not stronger.
I have bored you enough with text so here's my conclusion, i think Arceus came first theirs just more facts based off of it, now their holes in the theory either came first but i think Arceus still takes it,the only facts we get from Mew is that he has all the genetics of Pokemon while Arceus is the trio master of two trios and also is stated to have created everything. Although the debate is still open this is just my conclusion based off my research.
Gerald the Theorist solving the world of pokemon since 1996.