I prefer mystery dungeon over ranger, I've never played either ranger game. I think the only reason people buy them is to get the free pokemon from them. (the next poster or two will probably say I'am wrong about this, but this is what I think.) I will buy PMD explorers of the sky when it comes out. For people who never played PMD 2, What happens when Dialga loses control over time and gos insane with power? Buy PMD 2 to find out.