List of Pokémon with different forms

There are certain Kanto-region Pokémon that have different forms as they inhabit the Alola region.

#019 Rattata Kantonian form	#019 Rattata Alolan form
#020 Raticate Kantonian form	#020 Raticate Alolan form
#026 Raichu Kantonian form	#026 Raichu Alolan form
#027 Sandshrew Kantonian form	#027 Sandshrew Alolan form
#028 Sandslash Kantonian form	#028 Sandslash Alolan form
#037 Vulpix Kantonian form	#037 Vulpix Alolan form
#038 Ninetales Kantonian form	#038 Ninetales Alolan form
#050 Diglett Kantonian form	#050 Diglett Alolan form
#051 Dugtrio Kantonian form	#051 Dugtrio Alolan form
#052 Meowth Kantonian form	#052 Meowth Alolan form
#053 Persian Kantonian form	#053 Persian Alolan form
#074 Geodude Kantonian form	#074 Geodude Alolan form
#075 Graveler Kantonian form	#075 Graveler Alolan form
#076 Golem Kantonian form	#076 Golem Alolan form
#088 Grimer Kantonian form	#088 Grimer Alolan form
#089 Muk Kantonian form	#089 Muk Alolan form
#103 Exeggutor Kantonian form	#103 Exeggutor Alolan form
#105 Marowak Kantonian form	#105 Marowak Alolan form

There are certain Pokémon that have different forms as they inhabit the Galar region.

#052 Meowth Kantonian form	#052 Meowth Galarian form
#077 Ponyta Kantonian form	#077 Ponyta Galarian form
#078 Rapidash Kantonian form	#078 Rapidash Galarian form
#079 Slowpoke Kantonian form	#079 Slowpoke Galarian form
#083 Farfetch'd Kantonian form	#083 Farfetch'd Galarian form
#110 Weezing Kantonian form	#110 Weezing Galarian form
#263 Zigzagoon Hoenn form	#263 Zigzagoon Galarian form
#264 Linoone Hoenn form	#264 Linoone Galarian form
#554 Darumaka Unova form	#554 Darumaka Galarian form
#555 Darmanitan Unova Regular form	#555 Darmanitan Galarian Regular form
#555 Darmanitan Unova Zen form	#555 Darmanitan Galarian Zen form
#618 Stunfisk Unova form	#618 Stunfisk Galarian form

There are also Galarian forms of Slowbro, Mr. Mime, Corsola and Yamask in game data and they are mentioned in respective Pokédex entries, however they do not have any sprite nor model assets.

In Pokémon GO, Mewtwo has an extra Armored Form. Normal Mewtwo is more offense-oriented while Armored Mewtwo is more defense-oriented.

#150 Mewtwo

#150 Mewtwo

In case of Unown, there are no different types, moves nor statistics among any of its forms. Each of these forms resembles other letter of Latin alphabet with addition of exclamation and question marks.

A	B	C	D
E	F	G	H
I	J	K	L
M	N	O	P
Q	R	S	T
U	V	W	X
Y	Z	!	?

There are currently 20 different patterns for Spinda and additionally 20 another different patterns for its shiny variants in game data, which gives total of 40 different patterns for Spinda. 8 of these forms were released so far.

Castform can appear in different forms when spawns during certain weather conditions.

Different forms of Deoxys specialize in different extents of base stats.

There are three different forms of Burmy and three respective forms of its evoltuion, Wormadam. While Wormadam forms differs for its type, Burmy forms differ only with appearance of its cloak.

#412 Burmy Plant Cloak	#413 Wormadam Plant Cloak
#412 Burmy Sandy Cloak	#413 Wormadam Sandy Cloak
#412 Burmy Trash Cloak	#413 Wormadam Trash Cloak

Cherrim also has two different forms, which only difference is its appearance and the Weather condition for it to spawn. Sunshine form Cherrim spawns during sunny weather whilst Overcast form Cherrim spawns during every else weather condition.

#421 Cherrim Overcast form

#421 Cherrim Sunshine form

There are two different forms for each Shellos and Gastrodon. West Sea form Shellos is available on the West Hemisphere and East Sea form Shellos is available on the East Hemisphere.

#422 Shellos West Sea	#423 Gastrodon West Sea
#422 Shellos Eest Sea	#423 Gastrodon Eest Sea

Rotom has six different forms that differ with its secondary types.

#479 Rotom Regular form	#479 Rotom Heat form	#479 Rotom Wash form
#479 Rotom Fan form	#479 Rotom Frost form	#479 Rotom Mow form

Giratina has two forms namely Altered Forme and Origin Forme. Altered Forme is more defense-oriented while Origin Forme is more offense-oriented.

#487 Giratina Altered Forme

#487 Giratina Origin Forme

Shaymin has two different forms.

#492 Shaymin Land Forme

#492 Shaymin Sky Forme

Arceus has 18 different forms depending on its type.

#550 Basculin Red-Striped form

#550 Basculin Blue-Striped form

Besides its Galarian form, Darmanitan on its own has two different forms. Zen Mode one is not available currently.

#555 Darmanitan Standard Mode

#555 Darmanitan Zen Mode

#585 Deerling Spring form	#585 Deerling Summer form	#585 Deerling Autumn form	#585 Deerling Winter form
#586 Sawsbuck Spring form	#586 Sawsbuck Summer form	#586 Sawsbuck Autumn form	#586 Sawsbuck Winter form

Each member of Forces of Nature has two distinct forms - Incarnate Forme and Therian Forme.

#641 Tornadus Incarnate Forme	#641 Tornadus Therian Forme
#642 Thundurus Incarnate Forme	#642 Thundurus Therian Forme
#645 Landorus Incarnate Forme	#645 Landorus Therian Forme

The other Unova-region Legendary Pokémon to have different forms is Kyurem, which in spite of regular form has also Black and White forms.

#646 Kyurem Regular Kyurem

#646 Kyurem White Kyurem

#646 Kyurem Black Kyurem

#647 Keldeo Ordinary Form

#647 Keldeo Resolute Form

#648 Meloetta Aria Form

#648 Meloetta Pirouette Form