Quote Originally Posted by HKim View Post
Perhaps the RP setting involves some sort of day/night cycle idea. It doesn't have to be about the forces of day vs. the forces of night, but perhaps how the world might differ each cycle. Maybe people have different powers during the day vs. the night. Or maybe during the day, people are human and during the night, they are Pokemon. Lots of possibilities.
Some possible sources of inspiration for this that I can think off of the top of my head could be The Legend of Zelda: The Majora's Mask with it's reliance on times passage to move the story along as well as the presence of a big scary moon, and the plane of Lorwyn from Magic the Gathering where a bright sunny fantasy world coexists with a shadowy, more sinister counterpart and the shift between day and night results in some pretty profound shifts in setting and character.

Overall, I think that this Sun/Moon conception has a lot of potential behind it.