(21 Nov 2016, 6:57 pm)Michael wrote Trainers,
We have made adjustments to the CP (Combat Power) of various Pokémon. Some Pokémon, such as Alakazam, Rhydon, and Gengar will have their CP increased. Others will have their CP lowered. These changes will allow a more balanced and competitive battling and training experience in Gyms. We will continue to adjust the CP going forward to improve the game balance when necessary.
The Pokémon GO team
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Edit: this activates when u power up a Pokemon...
Couple of changes to mine are:
My Arcanine has dropped from 1845 to 1828.
My Laprus has gone from 1639 to 1762.
Ours have all changed automatically. Even my CP19 Dragonaire has gone up to CP20 and my CP 22 Gengar all the way up to 32. I'll have to get rid of it now. It's not as cute
My best (and most perfect) Vaporeon has gone up all the way to 2707!