It will randomize the encounter table of the current map you are on. You will only encounter Pokemon you have not yet captured. Once you have all 721 captured, then it will let you encounter anything. To use this plugin, place Pokemon Randomize.plg into the following folder on your SD card depending on your game. X: /plugin/0004000000055D00/ Y: /plugin/0004000000055E00/ OR: /plugin/000400000011C400/ AS: /plugin/000400000011C500/ *EDIT* it seems on X/Y that instead of checking the captured flags, it checks the kalos born captured. shouldnt effect anything on a new game, but using on old games you encounter stuff that in your dex as a pokeball.