This is the ParePare Expedition Map. You get invited to go here Oct. 1st week. You can find the Old Sheath and Gold Peaches here. Pink is for regular buildings in which you can find various items such as disc chips, mint leaves, etc.. The dark Green is for teleports which teleports you to a random location on the map. Cyan are the many blocks in the paths that your monster must get past. And finally the Light Green is for the special buildings where Ive found the Sheath and Peach.
Light Green Area #1- Is where I found the Old Sheath. I'm not sure about what is required to find this object first though. Probably has to deal with your rank as a trainer plus how high your monster's Int is.
Light Green Area #2- This is where you can find Golden Peaches. They pop up every 10 yrs.. Unlike MR1 you can find more than one golden peach at a time. On a lucky time I've found 3 on one trip.. YAY!!