The Bug-type Pokémon Wurmple in Pokémon GO is from the third generation of Pokémon and evolves into Silcoon or Cascoon, who in turn evolve into Beautifly or Dustox respectively.
Let's address the Phanpy in the room right away though: at present, there's no reliable method of securing a Silcoon or Cascoon evolution. It seems to be totally random, though certain players beg to differ.
In this guide, we'll round up the Wurmple evolution theories to give you a few methods you can try if you're really keen on getting a particular Wurmple evolution. Be warned though: there's little evidence or research out there to suggest that any of these theories work reliably.
How to evolve Wurmple into Silcoon or Cascoon
The problem with Wurmple is that there doesn't appear to be a reliable method of forcing a particular evolution. Eevee can also evolve into a variety of different Pokémon, but you can choose your evolution by simply renaming your Eevee.
Luckily, it doesn't take long to evolve a Wurmple: it only costs 12 Wurmple Candy, which isn't much! So you can just try and catch a bunch of Wurmple and evolve them one by one. And there's a 50/50 chance of getting either Cascoon or Silcoon, so it hopefully won't take too long to get what you need.
Some have theorised that evolving Wurmple in the day will get you Cascoon, and evolving it at night will get your Silcoon. Others claim it depends on Wurmple's highest IV, though there has been no clear evidence that either work consistently so far. For now, just keep evolving Wurmple!
If a definitive answer is ever found, we'll update this guide. In the meantime, you'll have to just keep trying to get the Pokémon that you desire.
How did Wurmple evolve in Ruby and Sapphire?
Another problem is that Pokémon GO doesn't have a personality system, which was the defining factor in knowing what evolution you were going to get in Ruby and Sapphire.
There wasn't a way to change the evolution there either, to be clear. Your Wurmple would just evolve get a particular evolution based on its personality, but at least there was a reliable method of knowing exactly which evolution you'd get ahead of time before evolving your Wurmple.
So there's nothing I can do to get the Wurmple evolution I want?
Players the world over are still trying to figure out just what the heck is going on with Pokémon GO's iteration of Wurmple. Given the lack of evidence otherwise, we're inclined to believe that it's entirely up to chance which type you end up with.
This article is part of our Pokémon GO walkthrough and guide series. We have articles that take you through the basics, covering How To Catch Pokémon: Throwing Tips, Poké Balls, & Capture Rates, How To Redeem Pokémon GO Promo Codes, How To Check A Pokémon's IVs Using An IV Calculator, How Trading Works, How To Track Pokémon Using Maps And Trackers, What Star Pieces And Stardust Do And How To Get Them, How Player Vs. Player Trainer Battles Work, and How To Complete Field Research And Research Breakthroughs And All Rewards.
We cover regular weekly and monthly Pokémon GO events, such as Spotlight Hour Times And Bonus Hour Times, and Community Days. We also have charts, including a Type Chart With Effectiveness And Weakness For All Types, an Egg Chart Explaining 2km, 5km, 7km, & 10km Eggs, and a Buddy Chart Explaining How To Earn Candy.
Elsewhere we cover Friend Code And Sharing Them For Easy XP and Which Pokémon GO 'Auto Catch' Companion Device Is The Best, plus more advanced tactics and info such as All Fast Moves And Charge Moves, How To Get TMs, And How It All Works, Shiny Pokémon And How To Catch Them, Glacial Lures, Magnetic Lures, Mossy Lures in Pokémon GO (And Their Exclusive Evolutions), How To Get Lots Of Candy Fast, How Lucky Pokémon Work & How To Catch Them, How To Catch All 27 Regional Pokémon, the Best Attackers And Best Defenders, All Raid Bosses And Best Counters Listed By Tier, What EX Raids Are And How To Get EX Raid Passes, What A Super Incubators Does And How To Get One, and How Get Mega Energy.
Pocket Monster-wise, we have specific guides for How To Get Pangoro, Sylveon, Glaceon, Aromatisse, Slurpuff, Sirfetch’d, Galarian Cofagrigus And More, How To Get Sylveon, Leafeon, Glaceon, Umbreon, Espeon, Vaporeon, Jolteon And Flareon, How To Evolve Wurmple Into Silcoon Or Cascoon, How To Get Tyrogue, Hitmonlee, Hitmonchan And Hitmontop, How To Use The Weather To Get Each Castform Form, How To Catch And Evolve Into Galarian Slowbro, How To Catch Smeargle, How To Find And Evolve Burmy, How To Catch Spinda, Where To Find Unown, How To Catch Ditto, and The Rarest Pokémon Including Wild, Shiny, Mythical And Regional Catches.
We also cover timed research and special events, including Mew's 'A Mythical Discovery', Jirachi's 'A Thousand-Year Slumber', Celebi's 'A Ripple In Time', and Regigigas' 'A Colossal Discovery'. Other (past) event guides include Twitch Codes List - Pokémon World Championship 2022, How To Battle A Challenger (World Championships 2022), How To Battle Fashion Challengers, 'A Spooky Message' Spiritomb Quest, Kanto Event FAQ, and the Summer Tour 2018 Chicago GO Fest And Dortmund And Yokosuka Safari Zones.