With this particularly half-outdated page, it seems like the drop rate of Berries is about 7.5%. But, what is the ratio between Razz Berry, Nanab Berry and Pinap Berry?
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Anecdotally, it was between 2.5:1:1 and 3:1:1 for my last ~2000 pokestop items – Kevin L Feb 20 '17 at 13:41
According to this article, based on more than 23 700 item drops, the drop rate of berries has globally increased with gen 2 and the new berries ! Here are some approximative rates :
so if we look at the ratio just among berries :
- Razz Berry : 53%
- Nanab Berry : 25%
- Pinap Berry : 22%