depends. it actually SEEMED to take longer in GSC. Luck with most of them, just training/catching in the right area at the right time. Other times it wasn't luck, like once I decided I wanted a turquoise Aggron, so I went to the Dewford cave and encountered shiny geodude zubat and nosepass first. I spent like 25 hours probably, just searching there. I know ur thinking, get a life, but it wasn't in one sitting and took a while.