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Niantic says that after a trade, the pokémon's IVs will be rerolled. The new values will be within a range of the old IVs, and the friendship level will affect the final IVs.

Is there anything specifically known about how the IVs will end up in the range?

5

According to this Silphroad thread on Reddit people there are quite confident that there are IV floors that increase based on friend level. So good friends have minimum IV of 1/1/1, great friends - 2/2/2, ultra friends - 3/3/3 and best friends 5/5/5.

On IV ceiling the debate seems to be still open. Some threads suggest there is none and you could (with a low probability) get a 15/15/15 (100%) from something that was initially lower. Some threads like this suggest that the upper ceiling is the current IVs of that Pokemon.

  • Thanks for this insightfull answer. But I wont accept it for now, since I want an answer that also gives more detail about the second part. so feel free to update your answer as soon there is more detail known about how the max ceiling works.. – Zaibis Jul 7 '18 at 16:47
  • Ive traded an eevee with my wife that went from 92% to 100% (We're best friends). I've had many others where IVs have gone up too (and plenty ,more that went down). – Notts90 May 28 at 15:24
4

As mentioned in the other answer, the floor depends on your friendship level. Good friends have a floor of 1/1/1, great friends have 2/2/2, ultra friends 3/3/3, and best friends 5/5/5. If a trade is lucky, the floor is 12/12/12, regardless of friendship level.

There is no ceiling to the IVs of traded Pokémon. They can be perfect even if you have a low friendship level or if the IVs are awful. Source: I have three perfects from trades, and my friends and I regularly trade to "reroll" stats of low IV Pokémon.

Stats are completely random between the floor and the ceiling, so it's often best to trade Pokémon with the worst IVs, since they have the greatest room for improvement.

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