Pokémon GO Shiny Pikachu Flying With a 5-Shaped Balloon – Trade 20.000 stardust (Read Describe)
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Stardust cost
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How to get GPS coordinates
https://www.alphr.com/find-gps-coordinates-android/
https://www.idownloadblog.com/2017/12/20/how-to-find-gps-coordinates-iphone/