In the beginning, there was the light and the darkness. The light was forged by the one they called Arceus. The darkness was forged by the Pokemon known as Kyurmai. (the natural assumption after reading this is that there must have been a time before light and darkness then, which makes your "in the beginning" a bit of a redundancy) Now, Arceus took the forged light and made a beautiful world, a one full of of its own kind, Pokemon. Then, Arceus saw that the Pokemon needed companions, companions not of their own kind. So Arceus forged the race known as Humans. Humans took Pokemon as friends and took them on adventures. Humans and Pokemon worked together to solve mysteries and they both battled together against other players. These Humans were called Pokemon Trainers. But...., Kyurmai, the forger of the darkness, saw that this world was too wonderful. So he took that beautiful world and infected it with darkness. Out of that darkness came Humans that don't care about the bond between Pokemon and Humans. They just cared about using Pokemon as tools. (why would a pokémon, even a spiteful one, do this? It seems more likely they'd go on an epic rampage and just destroy the things they don't like, right?) So, all of the newly created, darkness forged Humans went together and formed groups known as Team Rocket, Team Aqua, Team Magma, Team Galactic, and Team Plasma. (... please, please don't do that) Now, Arceus saw what Kyurmai did (this just makes me think "i c wut u did thar") and Arceus used his power and created a world, an opposite world, called the Mystery Zone. Then, Arceus fought Kyurmai and banished Kyurmai to the Mystery Zone. Kyurmai raged for centuries. But, to get out of the Mystery Zone, he forged the Seven Swords of Mystery. Kyurmai then used this power and broke through out of the Mystery Zone and into the world inhabited by Humans and Pokemon. But, two heroes fought Kyurmai and managed to banish Kyurmai back to the Mystery Zone. But while doing that, the Seven Swords of Mystery were scattered to random parts of this world. And so, this world has remained that way.....until now.