Pokemon Fan Theory Attempts to Resolve the Creation of Mew and Arceus ✖ Over the years, Pokemon fans have attempted to reconcile some of the contradictory Pokedex entries that have been provided for the legendary and mythical Pokemon. Two that have caused fans a little grief are the entries for Mew and Arceus. Both of their Pokedex entries present their respective creature as the first of all Pokemon. Mew's entry posits that the Psychic-type is the ancestor of all other Pokemon, while Arceus' entry claims that it created all Pokemon life. The Pokedex tends to take some... creative liberties with the backstories for each Pokemon, so fans shouldn't take everything in it as gospel, but user Nitsunekoni on Reddit has attempted to combine the two into a working theory.