How To Change Pokémon Iv Pokémon Go

Trading is a staple feature in Pokémon games and became an integral office of the Pokémon Become universe in July 2018. Pokémon Become introduced a twist to trading compared to the principal series games: Pokémon reroll their stats when traded. Travelers often take advantage of this past trading away their Pokemon with subpar IVs in hopes of rerolling better ones. One myth that emerged presently afterward the release of trading was that Pokémon with higher stats are more likely to keep high stats after trading. To many travelers, this seems intuitive. A Pokémon with higher stats should be more than valuable in a merchandise than i with lower stats, right?

To put this myth to the test, researchers in the Silph Research Group got together with friends and conducted over three,000 trades in a controlled study. Later on conscientious analysis of Pokémon stats before and after trading, we're ready to call this myth:

Busted

Methodology

Each Pokémon has iii stats (Assault, Defense, and Stamina, referred to as Private Values [IVs]) that are added to the base of operations stats of the species. IVs range from 0-xv for each single stat and are individually assigned to each Pokémon. When a Pokémon is traded, its IVs are randomly inverse.

In a Developer Insights post released shortly after the trading feature launched, Niantic provided the post-obit details regarding trade mechanics:

Another notable aspect of trading in Pokémon Go is that the stats of the Pokémon will modify randomly within a range when traded…. Nosotros starting time look at your friend's Trainer level to ostend the Pokémon is not powered upwardly by what would commonly be obtainable for someone at that level. Adjacent, nosotros assign minimum stat values based on your Friendship level, and that base increases the higher that level is. – pokemongolive.com

Based on these details, the Research Group hypothesized that the original IVs of a Pokémon do not bear on the IVs after it is traded.

For each trade, researchers recorded the trainer levels of the merchandise participants, the friendship level with the trading partner, the appraisals before and after the trade. Factors such every bit friendship level and lucky condition of a trade impact what the minimum value of each Iv can exist later trading.¹ For case, if a trainer is trading with a Adept friend, the minimum IVs possible are 1/one/1. This is referred to every bit the IV floor. If the trade goes lucky, the minimum IVs possible are 12/12/12, regardless of friendship level. Collecting data on the friendship level of the trading partners, forth with the lucky condition of each trade, allowed us to exclude unobtainable IV combinations from our expected counts for appraisals.

Findings

To test our hypothesis, we start looked at the mail-trade IV distribution. The total IVs for each traded Pokémon was categorized into a percentile range using the same boundaries every bit the "star" system of the Team Leader appraisal.² Using a Pearson's Chi-squared (χ²) goodness-of-fit test, we compared the number of traded Pokémon observed in each category to the number of Pokémon we'd expect to fall into each category if the IVs were uniformly distributed. The table below shows the observed IVs mail-trade, as well as the number of Pokémon we'd expect to autumn into each category if each 4 combination was equally likely (given the Four floor). We'll highlight Ultra and All-time friend trades, which have the most data points.

Ultra Friends
IV Percentile	Post-trade Count	Expected Count
0-fifty% (0*)	267	290.25
51-66% (1*)	473	452.79
67-80% (two*)	326	325.08
81-100% (3/4*)	95	92.88
χ² p-value	0.42
Best Friends
IV Percentile	Post-trade Count	Expected Count
0-50% (0*)	151	158.58
51-66% (1*)	619	660.75
67-80% (2*)	765	722.42
81-100% (3/4*)	227	220.25
χ² p-value	0.thirteen

For all friendship IV floors, we were unable to decline the null hypothesis at the chosen significance threshold of 0.05. This means that a Pokémon's IVs post-obit a trade closely marshal with a compatible distribution, and practice not trend toward a particular star appraisal.

The Relationship of Traded IVs

The next footstep was to examine the relationship between a Pokémon's IVs before and afterwards a trade. The plot below shows how the sum of the iii IV values changes for a unmarried Pokémon from before the merchandise to afterwards the trade.

Human relationship between the total IVs of a Pokémon prior to trading and the total IVs later trading. Each bespeak is a single traded Pokémon. A modest amount of noise was added to each point to help with visualization. The points are colored according to their IV floors, based on friendship level and lucky status. The black dashed line is the all-time fit simple linear regression of pre- and post-trade total IVs. The model explains but 0.one% of the information and is not meaning.

To formally test the relationship between pre-trade and post-trade IVs, we used a multiple linear regression. The Iv floor (Good, Great, Ultra, Best, and Lucky) of the trade was added to the model along with total IVs pre-merchandise (F(2,3514) = 464.three; R² _adjusted = 0.209). Of the individual variables, Iv floor was a pregnant predictor when determining post-merchandise IVs (t = xxx.384, p < 0.001), whereas pre-trade IVs had fiddling to no impact on post-trade IVs (t = 1.317, p = 0.188).

In add-on, correlations between the Attack, Defence and Stamina stats before and after trading were examined separately. No meaning correlation existed between the pre- and post-trade single stats.³ For avid GO Battle League participants, this ways that a Pokémon with a low Attack stat is no more likely to take a low Attack post-merchandise than a Pokémon with random IVs. Other than the 4 floors guaranteed by friendship level, it seems the post-trade IVs are best explained by RNG!

Parting Words

Many cheers to our Senior Researchers who nerveless data on thousands of trades to show that there is no meaning correlation between the pre-trade and postal service-merchandise IVs. Travelers can have satisfaction in knowing that their rerolled IVs will be completely random. Trading away unwanted Pokémon remains the best strategy to turn those trubbish IVs into treasure! Until our next trade, travelers, see you on the road!

Acknowledgements

Article author: Scientist CaroKann
Assay: Scientists CaroKann and Titleist
Editing: Scientists Cham1nade, skyeofthetyger, Titleist, and Lead Researcher archer
Graphics: Scientist WoodWoseWulf and Titleist
Project Leaders: Scientist Mihryazd

Footnotes

¹ The minimum Iv for each trade category is shown below.

Trade Category	Minimum 4
Good	i
Great	two
Ultra	iii
Best	5
Lucky	12

² A majority of the data was collected using the erstwhile IV appraisement system, which relied on team leader phrases to estimate IVs. Under the old appraisal system, the first phrase was used to indicate the "star" (0* – 4*), and the second phrase was used to indicate the the highest single 4 value within a predetermined range. Using a combination of the team leader phrases, Pokémon species, CP, and HP values, an in-firm algorithm was used to find the right IV combination. In the outcome multiple IV combinations fit the criteria, the hateful value of all possible IVs was assigned.

³ Using Pearson's product-moment correlation, we compared each unmarried 4 earlier and after a trade. I.e. the pre-trade Attack Stat was compared to the post-trade Attack Stat. No meaning correlation was found between the pre-trade and post-trade IV stat for Attack (r(3515) = 0.025, p = 0.14), Defense force (r(3515) = 0.018, p = 0.28), and Stamina (r(3515) = 0.014, p = 0.41).