Evolution, the series' most elaborate mechanic
On paper it's simple: a Pokémon grows stronger, then turns into a more powerful form. In practice, over a couple of decades and nine generations, we've ended up with methods so specific that some of them are hard to discover without luck or a tip from someone else. Turning your console upside down. Walking under a particular stone arch. Taking 294 points of damage from your own attacks. These aren't jokes; they're real evolution conditions.
This article sorts out all the main families of methods, from a plain level threshold to things that look like a bug in the code. If you want to check specific evolution lines along the way, you'll find the species pages in the Pokédex, and the comparison tool puts two forms side by side in seconds.
Level: the foundation of everything
The vast majority of Pokémon simply evolve when they reach a certain level. Starters usually go through their first change around 16 and their second around 36. Early-game bugs can change as soon as level 7. Pseudo-legendaries like Dratini and Larvitar make you wait until 55, which is part of their "price": a long grind in exchange for high final stats.
Two things are worth remembering. First, you can cancel an evolution with the B button, and sometimes that pays off, because some species learn moves sooner in their earlier form. Second, an Everstone (a held stone) blocks evolution for good until you take it away.
Level plus an extra condition
This is where it gets tricky. Sometimes level alone isn't enough:
- Time of day: Rockruff becomes Midday Lycanroc during the day and Midnight Lycanroc at night. Same number on the counter, two different creatures.
- Gender: Combee evolves into Vespiquen only if it's female; males stay Combee forever. Likewise, Salandit becomes Salazzle only as a female.
- Weather: Sliggoo turns into Goodra only in the rain (or fog in some games), which can leave a player stuck for hours.
- Location: Magneton, Nosepass, and Charjabug historically required you to go to a specific place with a magnetic field.
- Party member: Mantyke evolves only when there's a Remoraid in your party.
Evolution stones
The oldest alternative to leveling, and still the easiest to understand. You use the item and the evolution happens instantly, with no waiting and no training. The catch: a Pokémon evolved with a stone usually learns very few moves on its own afterward, so it's a good idea to wait until it learns what it needs in its base form.
| Stone | Types it works on | Examples |
|---|---|---|
| Fire Stone | Fire | Vulpix → Ninetales, Growlithe → Arcanine, Eevee → Flareon |
| Water Stone | Water | Poliwhirl → Poliwrath, Shellder → Cloyster, Eevee → Vaporeon |
| Thunder Stone | Electric | Pikachu → Raichu, Eelektrik → Eelektross, Eevee → Jolteon |
| Leaf Stone | Grass | Gloom → Vileplume, Weepinbell → Victreebel, Nuzleaf → Shiftry |
| Moon Stone | Fairy, Poison | Clefairy → Clefable, Jigglypuff → Wigglytuff, Nidorino → Nidoking |
| Sun Stone | Grass, Electric | Gloom → Bellossom, Petilil → Lilligant, Helioptile → Heliolisk |
| Shiny Stone | Fairy, Normal | Togetic → Togekiss, Roselia → Roserade, Minccino → Cinccino |
| Dusk Stone | Dark, Ghost | Murkrow → Honchkrow, Misdreavus → Mismagius, Doublade → Aegislash |
| Dawn Stone | Psychic, Ice (with a gender condition) | Kirlia (male) → Gallade, Snorunt (female) → Froslass |
| Ice Stone | Ice | Alolan Vulpix → Alolan Ninetales, Eevee → Glaceon, Cetoddle → Cetitan |
The Dawn Stone is the only stone with a gender condition built in: it gives completely different results depending on who you use it on. The Ice Stone, meanwhile, only took over the role of Eevee's "Ice" evolution in the eighth generation; before that you had to go and train next to a specific rock.
Friendship and affection
Instead of an experience threshold, what counts here is a hidden affection counter. It goes up when you keep the Pokémon in your party, win battles, feed it vitamins, and go on walks. Once it passes the right threshold, the evolution happens at the next level up.
- Golbat → Crobat: the classic, and for years a torment for players who couldn't understand why reaching level 60 did nothing.
- Chansey → Blissey, Pichu → Pikachu, Munchlax → Snorlax, Type: Null → Silvally.
- Eevee → Espeon with high friendship during the day, Eevee → Umbreon with the same friendship at night.
- Riolu → Lucario and Budew → Roselia: also with a time-of-day condition (daytime).
An important detail: friendship drops when a Pokémon faints or is given bitter medicinal herbs. Historically it also reset with every trade, because the counter is tied to a specific Trainer.
Trading
A method from the first generation, designed to encourage you to play with someone else. The four canonical cases are Machoke → Machamp, Haunter → Gengar, Kadabra → Alakazam, and Graveler → Golem. Later they were joined by Boldore → Gigalith, Gurdurr → Conkeldurr, Phantump → Trevenant, and Pumpkaboo → Gourgeist. A separate variant is trading two specific species for each other: Karrablast and Shelmet evolve only when they're traded for one another, and one ends up with the other's shell.
Since Legends: Arceus there's the Linking Cord, an item that simulates a trade. It's a quiet admission that, after two decades, forcing players to connect with someone else had stopped being fun and become a barrier.
Trading with a held item
- Metal Coat: Onix → Steelix, Scyther → Scizor
- King's Rock: Poliwhirl → Politoed, Slowpoke → Slowking
- Dragon Scale: Seadra → Kingdra
- Up-Grade: Porygon → Porygon2, and then Dubious Disc: Porygon2 → Porygon-Z
- DeepSeaTooth and DeepSeaScale: Clamperl into Huntail or Gorebyss, respectively
- Protector, Electirizer, Magmarizer, Reaper Cloth: Rhydon, Electabuzz, Magmar, and Dusclops
Held item plus level
The lighter variant: the item stays in the Pokémon's paws, but no trade is needed. You just have to level up under the right conditions.
- Razor Claw + level up at night: Sneasel → Weavile
- Razor Fang + level up at night: Gligar → Gliscor
- Oval Stone + level up during the day: Happiny → Chansey
- Peat Block during a full moon: Ursaring → Ursaluna
The oddities: who needs a manual anyway?
Sylveon
Eevee's eighth variant needs two things at once: high affection (tracked by a separate affection counter in the sixth and seventh generations, and by regular friendship later on) and knowing any Fairy-type move. Baby-Doll Eyes on its own is enough. If you're not sure how the Fairy type stacks up against the rest, take a look at the type chart.
Inkay and Malamar
The boldest idea in the whole series: Inkay evolves at level 30, but only if the console (or controller) is turned upside down at that moment. The condition has no story explanation beyond the fact that Malamar literally stands on its head. Without an outside tip, you'd practically never figure it out.
Pancham
Evolving into Pangoro at level 32 requires a Dark-type Pokémon in your party. Story-wise, the little panda troublemaker picks up bad manners from a buddy.
Tyrogue
At level 20 the game compares Attack and Defense. Higher Attack gives Hitmonlee, higher Defense gives Hitmonchan, and a tie gives Hitmontop. You can steer it by choosing the right vitamins, or mess it up by feeding them blindly.
Wurmple
At level 7 Wurmple turns into Silcoon or Cascoon, and you have no say in it at all. A hidden personality value assigned when it was caught decides, a bit like a coin toss made before you even saw the Pokémon.
Shedinja
The only case where one Pokémon turns into two. Nincada becomes Ninjask at level 20, but if you have a free party slot and a spare Poké Ball in your Bag, Shedinja also appears in that empty slot: an empty shell with one HP and the Ability Wonder Guard.
Feebas and Milotic
Originally: max out its Beauty condition with Pokéblocks made from suitably blue Berries, then level it up. The method was convoluted and closely tied to Contests, so the fifth generation added a simpler path: trading it while it holds a Prism Scale.
Runerigus and Basculegion
Galarian Yamask evolves if it takes at least 49 points of damage in a single battle without fainting and then walks under a stone arch in a specific spot in the region. Basculegion, for its part, requires a White-Striped Basculin to take a total of 294 points of recoil damage from its own attacks. Both methods turn story conditions literally into numbers, and both demand that you dig through the flavor text before you can pull them off in the game.
The same drawer holds Milcery (spinning in place with the right Sweet), Toxel (its nature decides which form of Toxtricity you get), and Galarian Farfetch'd (three critical hits in a single battle). If you're looking for a specific species from this list, the fastest way to find it is the search.
Regional evolutions from Hisui
Legends: Arceus added methods based on items from the region and on using specific moves in a specific style:
- Kleavor: a Scyther treated with a Black Augurite, an alternative to the classic Scizor.
- Ursaluna: an Ursaring with a Peat Block, only during a full moon.
- Sneasler: a Hisuian Sneasel with a Razor Claw, but during the day, the exact opposite of Weavile.
- Wyrdeer and Overqwil: they require using a specific move twenty times in the right battle style.
It's an interesting direction: instead of a number on a counter, the game looks at what you do with your Pokémon.
What shouldn't be called evolution
Three things often get mistaken for evolution even though they aren't:
- Mega Evolution: despite the name, it's a temporary transformation during battle that requires a Mega Stone and ends when the battle does. The Pokémon goes back to its original form.
- Dynamax and Gigantamax: growing huge for three turns, only in designated places. A purely situational bonus.
- Regional forms: Alolan Vulpix and Galarian Ponyta are separate variants of a species, not another stage of development. Pikachu doesn't "evolve" into a regional version; that version simply exists alongside it.
Form changes work the same way. Deoxys, Rotom, or Aegislash switching between stances are reversible and don't change their place in the evolution line.
Evolution is one-way and permanent. Anything you can undo at the end of a battle or with a single click is a form change, even if the marketing says otherwise.
How to handle it in practice
One practical tip to finish with: before you use a stone, check what the base form will learn over the next few levels, because that pool usually dries up after evolution. With friendship-based methods, don't keep reshuffling your party. And for oddities like Inkay or Runerigus, just trust a guide, because the odds of figuring them out on your own are close to zero. The rest of the evolution lines are waiting in the Pokédex.