To make characters follow you, on every map, create the event for the character that you want to follow you, set up a switch, so when he or she joins your party, that event will now have the sprite of the character. Then have the even be parallel process, and have him steping one step closer to you, and repeat it, at whatever speed (To have him actuall follow you, look under move command in the 2nd page). Prsto, the guy should follow you till the ends of the earth.