Pokemon GO: How to get Nanab Berries for Season of Legends Research and Rewards Here's how you can get some juicy Nanab Berries. Pokemon GO players are being treated to an absolute wealth of activities in March. As we enter the Season of Legends, we’re getting a range of new wild Pokemon, a myriad of Raid boss changes, plenty of different events and lots of research tasks to complete. Some of these research tasks are causing players a few issues, however. One of these is “Take a snapshot of Landorus” and the other, “Use three Nanab Berries to help catch Pokemon.”