Well, it says that Mew created all Pokemon, but Arceus is the creator of the universe. Who came first?
If Arceus is a so called "god" then it should be able to create itself on its own, but Mew created every Pokemon. Perhaps Mew created Arceus, who then shaped the universe? But then why would Arceus leave Dialga to control time and Palkia to control space. Then to only have Mesprit, Uxie and Azelf stop Dialga/Palkia (depending on the game you have) from "power tripping". (xD) Also, if there were 151 original Pokemon, then how come these Pokemon, 3 generations later, are introduced into creating the universe now...
Also if Arceus is the "creator" how come other Pokemon, such as Groudon formed the land, and Kyogre the water. But then Lugia (In Pokemon 2000) basically stops the world being destroyed with the help of the "Chosen One" (Ash) Lugia is also called, "The Guardian". Also the three birds, they control the forces of nature because of their orbs, they needed to be placed in the shrine, and yet the weather goes all out of whack, but I thought that Kyogre, Groudon and Rayquaza controlled the weather, not the birds?
There's something to ponder on...