To duplicate rare candies, simply go to your house, take the rest get 200 pokemon go talk to prof. birch, go to the rest house, say yes until 100 rests, then beat the elite4, go get latios or latias, depending on your game go to the safari zone, get a acro bike and jump the white lines, talk to the first person u see the ground will shake and jirachi will appear, and run away, then the first 7 items in ur pocket will be rare candies, 99 each and to get jirachi go to the sky pillar, go wear rayquaza was, save turn it off, then on, jirachi will appear, warning: it's at level 75 and knows, sycic, confusion, wish, and hyper beam. This might not work, but it did for me cuz it might of just been a glitch- I sware it worked for me!!!!!!!!!!!!!