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There are a lot ofPokemon. No really, there are so many. Over 1000 of them at this point. That’s quite a bit, even for a series that has been running for over 25 years. But if you’re familiar with the concept of a Living Dex, you’ll know that can go far beyond the standard number of Pokemon.
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For example, completing a Living Dex requires one of every Pokemon in every form, shiny variant and more. Forms (or Formes, as they’re sometimes spelt in-game) come in many different, well, forms. For some Pokemon, this is a simple design change, to altering their types and even evolutions entirely. Even more complicated? Some Pokemon have lots of different forms, too.
What Are Forms?
Forms, in the simplest terms, arethe various different ways that Pokemon exist. Deoxys, for example, has different forms that alter both its appearance and stat distributions. Others have regional forms, being the same Pokemon but with different looks and types depending on the region they’re in.
As the series has gone on, plenty of form types have been added, letting older Pokemon have another chance to shine. This applies mostly to Gen 1 Pokemon, getting most of the highlights of regional forms, but plenty of games introducePokemon that utilise forms unique to that entry as well.

Regional Forms
Introduced withPokemon Sun & Moon,regional formsgive older Pokemon, all from Kanto in their first appearance,a new look and type to fit their evolution in other regions.
For example,Alolan Raichu gains the Psychic typeand uses its tail to surf, and Alolan Exeggutor becomes a giant palm tree with the Dragon type.

The trend continued in later games too, with manyPokemon gaining unique forms to the Paldea and Galar regions. For the most part, each Pokemon only gets one regional forms, with only a few exceptions:
By this merit,Tauros already has the most regional formsdespite only appearing in a single game.

Alternate Forms
Some Pokemon haveunique forms that are linked to their respective games. Usually, this comes in the form of extra gameplay elements for legendary and mythical Pokemon, but also extends to some regular Pokemon as well. This one is a bit wider than other forms, as itencompasses everything that isn’t a regional form, or tied to a specific game mechanic.
Most Legendary and Mythical Pokemon have some unique gameplay, such as Deoxys' forms changes to alter their stats, or the Legendary trio ofBlack & White’s ability to be fused together to form a hybrid form.

It can be hard to catalogue these forms, but in terms of these unique Pokemon, the following four have the highest number of alternate forms:
When looking at non-Legendary and Mythical Pokemon,alternate forms get a bit more interesting. For many, they are simple changes and many even random.
For example,almost every single Spinda has a unique spot pattern. Deerling spawn with a different coat depending on the season in Black & White.
Even though it might be unfair seeing as which form appears is out of your control, let’s see which Pokemon have the most alternate forms.
Gimmick Forms
Some games introduced unique mechanics that later had no reasonable means of being reintroduced, meaning that the new forms of Pokemon introduced in them were also trapped in their respective games. These include the systems ofMega Evolutions and Gigantamaxing.
The majority of Pokemon, like with regional forms, only have a single Mega Evolution or Gigantamaxed form, though there are some exceptions.
Though some other Pokemon have both a Mega Evolved and Gigantamaxed form,none have the same amount combined as Charizard, with a total of three across the games.
Which Pokemon Has The Most Forms?
When it comes to the single Pokemon that has the most forms, it is an easy question to answer.Spinda has over 3,000,000. Though, seeing as it is completely random, it is fair to sayAlcremie has the most forms with 63.
However, if you were to ask which Pokemon has thehighest number of formtypes,then the answer would be… none of them. Plenty of Pokemon have two or three different form types. Charizard has both a Mega and Gigantamaxed form. Meowth has regional forms and a Giganatamax form.
If you were to split the differences even more, perhaps you could get a deeper and more precise answer. As it stands now,no specific Pokemon is given a special preference in terms of pure number oftypesof forms.