Pokemon dropped IV after evolving
Is there a reason my perfect IV Poliwhirl dropped its IV after evolving to Politoad? It's IV went from 15-15-15 to 14-15-15.
Bogopo last edited by
No. IVs do not change on evolution. The only way for a Pokemon's IVs to change is upon trading it to another player, or upon purification.
What you are describing is almost certainly either a case of mistakenly evolving the wrong Poliwhirl, or simply misremembering its IVs.
If you have unlocked the Perfect Dex you can use that to check if you actually have a perfect Poliwhirl recorded. If not, you misremembered its IVs, but if you do you probably just evolved the wrong one.