Pokemon Go

RNG Calculation – Eeeveelutions



This really made me so frustrated: it took 15 dmax eeveelutions to FINALLY get a jolteon. Is my math correct with this, that the chance of this happening would be (0.6666)15?

Statistically, the 0.66 comes from the chance of receiving either Vaporeon or Flareon, and it took 15 evolutions before getting Jolteon. My calculation says this would be a 0.2% chance of occurring; would this be an insane amount of unluckiness via RNG in this instance? Have any other players encountered disparate odds?

I just wanted to complete the collection challenge, and thought this would be a LOT easier 🙃

by elijahjames96

25 Comments

  1. Repulsive_Geologist5

    Just want to add on, obviously very anecdotal, I’ve evolved 7 eevees so far, 6 vaporion 1 Jolteon. Was chalking it down to insane bad luck, but who knows

  2. I’ve evolved 8 Eevees so far: 6 Jolteon, 2 Vaporeon.

  3. SouthernBiscuit

    I evolved three in a row, got Vaporeon, then Jolteon, then Flareon. I thought maybe they’d made it less random for the collection. I guess I just got really lucky.

  4. Salt_Inflation_2677

    Took me 10 times to finally get Flareon, got 3 Jolteon and 6 Vaporeon before I got 1 Flareon.

  5. ggpandagg

    damn, i thought i had bad rng, took me 11 evos to complete the trio

  6. ContestEnough5606

    I got mine Jolteon, Flareon, Vaporeon back to back I got lucky

  7. real_fyshi

    Got all of them within 3 evolves. And that 3 times in a row. lol.

  8. I got 3 Flareons in a row and then and there decided to give up, not falling for that crap anymore, dont care enough for that medal to keep wasting my max particles on.

  9. idriskitforabiscuit

    while it doesn’t meaningfully change the result, the math geek in me would like to share that your result will be more accurate if you do (2/3)^15 instead of approximating 2/3 as 0.66666 😉

  10. Aggravating_Toe_4992

    They could easily fix this (and improve the fun for everyone) by simply allowing traded pokemons to complete the collections. Duh!

  11. No_Technician3158

    I did 6 eevees and got 5 jolteons today lollll

  12. Artoo_Detoo

    After getting 6 Vaporeons and 2 Jolteons I tried the name trick of Pyro to get Flareon but failed and still got Vaporeon. I 100% know I didn’t use the name trick before. I guess it just doesn’t work.

  13. Fun_Significance_182

    Took me 8 but i try not to evolve them in a row or i get jolts or vaps in a row

  14. dismahredditaccount

    So you’re doing the math for “what are the odds of evolving 15 and not getting a Flareon”, but that’s not exactly what you want to know here. After all, if you’d done 15 and gotten Flareon and Vaporeon but no Jolteon, you’d be here asking the same thing, right? The thing you really want to know is “probability of evolving 15 without completing the set”, which is 3x (0.666…^15) (since there are three ways you could have not completed the set). That works out to 0.7%.

    That seems rare, and it is, but you also have to realize there are thousands of ways to slice the data. On research day, I completed 87 tasks and only received one shiny— that’s about a 0.1% chance! But on Shadow Kyogre weekend, I did eight raids and got three shinies— that’s just a 0.5% chance! (And again, neither of those measure the true odds, because if I’d gotten 0 shinies on research day or 4 shinies on shadow raid weekend, I’d also be asking “what were the odds?”, so I should probably include those in the calculations, too.)

    For my part, I started this weekend with seven straight Flareons. What were the odds?! (0.05% for Flareon specifically, or 0.1% for seven straight of any of the three.) I then got Vaporeon and Jolteon back-to-back on my next two. What were the odds?! (11% for that specific order, or 22% if we just care about completing the set on our next two evos.)

    I can easily think of 1,000 different things I could calculate odds for from the past month alone— my shiny Morpeko rate, my shiny dedenne rate, my 3* shadow Latios rate, my wild hundo rate, my research hundo rate, my ratio of Abomosnow tasks to Glalie tasks in field research— and for the vast majority of these my outcomes will be in the fat part of the distribution (I got 1 shiny Morpeko in 91 sightings, which at 1 in 64 shiny odds should happen around 34% of the time— not surprising at all). But for 1 out of every 1,000 things I look at I should expect to find my luck way out at the 0.1% range.

    When I find that one thing out of a thousand, I could ask “man, what were the odds of that?!” and “one in a thousand!” and “practically guaranteed!” would both be perfectly valid answers, depending on your perspective. In some ways, the most unlikely thing of all would be finding that you didn’t have any unlikely things at all.

  15. _Tophzilla

    Took me 17 to get the Jolteon I needed. *shrug* RNG gonna RNG

  16. Krispy_Knight

    Humans are bad at understanding odds because we tend to only perceive 1 dataset (ourselves). Technically, the outcome of evolving 15 Eevee is always 0.2%, whether you get 5 of each or some other combination. But because we value certain combinations over others, it appears that the RNG is biased.

  17. MoneyAd5542

    I’m at 12, only flareon and jolteon… wtf is this lol

  18. This just reinforces that they need to do something for the original evolutions, it’s absolutely ridiculous.

  19. LordCommanderTaurusG

    It took me 11 dmax eeveelutions to get all three lmao

  20. My eleventh completed the set. In order:

    Jolteon, Vaporeon, Jolteon, Vaporeon, Jolteon, Jolteon, Vaporeon, Jolteon, Vaporeon, Jolteon, Flareon

    Rubbish system, hope they never do something like this again

    inb4 Dynamax Vespiquen

  21. spacemanspiff8655

    Evolved 5 on Saturday. All Vaporeon.

    Evolved 3 on Sunday. All Flareon.

    First evolve on Monday. Molten.

    There was definitely something fishy going on.

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