Which Chansey would you evolve?
Both are level 20 hatches. Stats are given AT/DEF/HP.
Chansey 1: 829CP, 306HP, 15/11/13, 86.7%
Chansey 2: 825CP, 305HP, 14/15/(11 or 12), 88-91%
1 has lower overall IV's, but will have higher CP and HP when powered up due to higher HP stat. But, #2 has perfect defense, and I'm hoping to use it for gym placement.
I normally don't ask for a lot of advice, but this one has me a little confused.
Answers
Different websites and calculators give IVs in different orders, so it is good to specify how you are listing. 15a/11d/13s and 15s/11a/13d are very different distributions for a Blissey.
In general, the attack stat contributes more to CP than defense or stamina, so the Atk IV is usually going to have a greater effect. Especially with Blissey's wonky base stats, the Atk IV has a much more significant effect on CP than the Stm IV.
https://pokemongo.gamepress.gg/cpcalc#/
You can check the CP calculator to see how these specific Chanseys will evolve.
i'm in similar boat with 2 hatched chanseys, one with a bit more hp but less def, other vice versa. plugged IV's into https://pokeassistant.com/battlesimulator?locale=en and it suggests there would be very little difference - i'd go for the higher defence one personally as while HP is generally better because of extra energy in IV terms you are talking a couple of extra attacks between 1 and 15.
While people blindly parrot that attack is the most valued IV, as if Chansey's without 15 attack are useless, the Chansey with 14 attack does come very close and actually has higher max CP if the stamina IV is 12. The CP increase from 1 attack IV is more than 3 defence IV but below 4.
In order of highest CP:
• 14A/15D/12S - 3187 max CP
• 15A/11D/13S - 3186 max CP
• 14A/15D/11S - 3184 max CP
At this point it's just splitting hairs. But if I had to choose, I would power up the one with the 15 defence even if I knew it had 11 stamina, because it would have a slightly higher chance of timing out of the opponent.