Same number, different Pokémon
Look up number 38 in the Pokédex and you get Ninetales. A Fire type, like every Ninetales since the first generation, unless you mean the Alolan one, which is Ice/Fairy and has nothing to do with fire. Same National Dex number, same name, and a completely different opponent that this form can't stand up to.
A regional form is a species that evolved differently in another region, in response to a different climate, different surroundings, and a different history. Today there are 59 of them in the games, spread across four regions. Below is what they have in common, what sets them apart, and what isn't obvious at first glance.
What changes is what it is, not how strong it is
The most surprising thing in this data is also the easiest to check. All 59 regional forms change type. Not a single one keeps the original. There's no exception here, no form that differs only in looks.
At the same time, 58 of the 59 have a base stat total identical to the original variant down to the last point. The only exception is Galarian Darmanitan in Zen Mode, and that isn't a separate regional form but a battle toggle that regular Darmanitan has too.
Those two numbers give you the whole rule: a regional form isn't an upgrade, it's a shift. You don't get a stronger Pokémon, just a different one, with different weaknesses, a different set of resistances, and a different place on your team. Anyone who goes after regional forms hoping for a numerical edge is looking in the wrong place.
What a type change actually does
Type decides two things at once: what this Pokémon can hurt its opponent with, and what can hurt it. A type change rearranges both sides at the same time, and that's the whole point of the mechanic.
Three cases where the shift is biggest:
- Alolan Marowak: from pure Ground to Fire and Ghost. Regular Marowak fears Water and Grass; the Alolan one resists Grass but loses its immunity to Electric. Same name, the opposite set of problems.
- Galarian Corsola: from Water and Rock to pure Ghost. Regular Corsola has four weaknesses, including a quadruple one to Grass. The Galarian one doesn't take Normal or Fighting moves at all.
- Hisuian Zorua and Zoroark: from Dark to Normal/Ghost. They're the only two Pokémon in the entire Pokédex with that combination, and it's an exceptionally handy one: Normal doesn't affect Ghost and Ghost doesn't affect Normal, so both immunities sit on a single Pokémon.
A few regional forms even have typings nobody else has. Alolan Ninetales is the only Ice/Fairy Pokémon in the game. Alolan Sandshrew and Sandslash are the only Ice/Steel pair. Galarian Weezing shares its Poison/Fairy combination with just one species outside this group.
Four regions, four ideas
The split isn't even and it isn't random: each region adds as many forms as it needed to tell its own story.
| Region | Forms | What sets them apart |
|---|---|---|
| Alola | 19 | An island climate turned on its head: Fire species became Ice (Vulpix, Ninetales), desert ones became Ice too (Sandshrew), and volcanic rocks got charged with electricity (Geodude and its whole line). |
| Galar | 20 | An industrial, foggy region, and you can see it in the types: Steel shows up (Meowth, Stunfisk), along with Poison (Slowpoke) and Dark. The trio of legendary birds got their own completely reworked versions here. |
| Hisui | 16 | The same land as Sinnoh, only centuries earlier. The forms are harsher and more often add Rock or Fighting to something that used to be gentle: Growlithe and Arcanine gain Rock, Lilligant gains Fighting. |
| Paldea | 4 | The smallest and most focused group: three variants of Tauros (Fighting, plus Fire or Water) and a Wooper that swapped Water for Poison. |
The most common type among all regional forms is Dark: twelve of them have it. It's the same observation as above, just from the other side. Dark is a type the early generations barely used, so adding it to old species changes how they behave in battle the most.
Abilities change almost as often
50 of the 59 forms have a different set of Abilities from the original variant. It's the part that's easy to forget, because in the Pokédex it sits below the types, and it can tip a matchup harder than they do.
Alolan Raichu is the best example: it gets Surge Surfer, which doubles its Speed in Electric Terrain. Its base stats stayed the same as regular Raichu's, but a Pokémon that can double its Speed plays completely differently from one that can't. The numbers in the table won't show you that.
If you want to see how much an Ability like that really takes off the HP bar, enter both sides into the damage calculator. The Ability list there automatically narrows to the ones the selected Pokémon actually has.
Three things that trip people up
- The National Dex number doesn't change. Alolan Ninetales is still 38. In the regional Pokédex it also sits under the same number as the original variant, because the number belongs to the species, not the form. It counts once toward completing the Pokédex.
- Not every name with a region in it means a regional form. Alola Cap Pikachu is just a regular Pikachu with a travel souvenir: it's an Electric type with regular Pikachu's stats and nothing to do with the island variants.
- Evolution doesn't have to lead where you expect. Some regional lines split at the end: a base species from one region can evolve into something the other version doesn't have at all. The full tree with its conditions is on every species page under the "Full line" link.
Where to check it yourself
Every regional form has its own page on this site, with its own typing, its own stats, its own movepool, and its number in its region's Pokédex. Type the name the way you see it on screen ("Alolan Ninetales") and the search will find it; the region on its own is also a good search term if you want to see the whole group at once.
To compare them with everything else, open the rankings with regional forms. You'll see exactly what this article says: no regional form makes it to the top, because none of them was made stronger. Something else changed, and that's the whole reason to play them.