Introduced in Pokémon Gold and Silver was the new concept of Pokémon (Unown) with different forms. This has now spread to a wide variety of Pokémon that look different depending on their location, the item they are holding, or a condition.
 
To find out the different forms of each Pokémon, and how to get them, read on! For your convenience, you can use the quick links below for easier browsing.

Introduction Back to Top
 
It used to be that the same Pokémon looked the same anywhere you went. A Rattata in Pallet Town looked exactly like a Rattata in Fuchsia City. Well, this was changed with the advent of Pokémon forms. Not only do Pokémon look different depending on their gender, they can also change forms depending on the weather, the environment, their personality and the item that they are holding! For each Pokémon, there is a different requirement.

 
There are many Pokémon each with their different forms. It may be hard to remember which Pokémon has what forms, and that is why this guide was created! You can use the quick links above or scroll down to view the forms of each Pokémon.

Pichu Back to Top
 
In Pokémon HeartGold and SoulSilver, and new form of Pichu was introduced. If you trade over a special Pikachu over into HGSS, an event will activate in Ilex Forest. With the special Pikachu in your party, if you stand in front of the shrine, the Spiky-Eared Pichu will appear.

This Pichu is very special, with the fact that it cannot be traded over to any other games, and it knows moves that Pichus normally cannot learn. It also cannot evolve into Pikachu or Raichu, although it can continue to level up.

Unown Back to Top
 
Unown, the strange rune-like Pokémon that has 28 forms, each representing a letter of the English alphabet, an exclamation mark, or a question mark. These mystical beings can be found in Tanoby Chambers in Pokémon FRLG, Solaceon Ruins in Pokémon DPPt, or the Ruins of Alph in HGSS. Otherwise, they must be traded from other games. Unlike other form Pokémon though, Unown cannot change between its forms.

Castform Back to Top
 
Castform is an interesting Pokémon, as its form and type changes with the weather. First introduced in Pokémon Ruby and Sapphire, Castform can be found in four forms: Normal, Rain, Sunny, and Snow-cloud.

The normal Castform is a Normal type Pokémon. It can be found in the Weather Institute in Pokémon RSE and in the Trophy Garden in Pokémon DPPt. Otherwise, it must be traded from other games in order to get it into the Pokédex.

The Rain Castform is a Water type Pokémon. Castform changes into this form when it is sent out to battle during a rain or when an attack such as Rain Dance is used. Outside of battle or when the weather clears, Castform returns to its normal form.

The Sunny Castform is a Fire type Pokémon. Castform changes into this form when it is sent out to battle when it is sunny or when an attack such as Sunny Day is used. Outside of battle or when the weather clears, Castform returns to its normal form.

The Snow-cloud Castform is an Ice type Pokémon. Castform changes into this form when it is sent out to battle when it is hailing or when an attack such as Hail is used. Outside of battle or when the weather clears, Castform returns to its normal form.
 

Deoxys Back to Top
 
Deoxys, the strange legendary Pokémon that came from a meteorite in outer space. In the games, it can be found in Birth Island in Pokémon Emerald and FRLG, and from Pokémon events around the world. Otherwise, it must be traded to other games.
 

The Normal Forme has high stats in Attack, Speed, and Special Attack. Deoxys can be changed to this form by talking to the middle meteorite in Hearthome City or the top left in Route 3. In the older generations, it can only be found in Pokémon Ruby and Sapphire.

The Attack Forme is stronger in Attack and Special Attack. Deoxys can be changed to this form by talking to the bottom left meteorite in Hearthome City or the top right in Route 3. In the older generations, it can only be found in Pokémon FireRed.

The Defense Forme is stronger in Defense and Special Defense. Deoxys can be changed to this form by talking to the bottom right meteorite in Hearthome City or the bottom left in Route 3. In the older generations, it can only be found in Pokémon LeafGreen.

The Speed Forme is stronger in Speed. Deoxys can be changed to this form by talking to the top meteorite in Hearthome City or the bottom right in Route 3. In the older generations, it can only be found in Pokémon Emerald.

Burmy and Wormadam Back to Top
 
Once again, a new type of form-changing was introduced in the world of Pokémon. Burmy changes form depending on the environment it is in. This strange Pokémon takes whatever material there is available and uses it to build a protective layer around itself. Burmies can be found in Sweet Honey Trees all over Sinnoh.
 

The Trash Cloak Burmy and Wormadam are Bug types, but Wormadam is also the Steel Type. To change into this form, Burmy must have last battled in a building. If Burmy evolves, it will become a Trash Cloak Wormadam.

The Plant Cloak Burmy and Wormadam are Bug types, but Wormadam is also the Grass Type. To change into this form, Burmy must have last battled outside. If Burmy evolves, it will become a Plant Cloak Wormadam.

The Sandy Cloak Burmy and Wormadam are Bug types, but Wormadam is also the Ground Type. To change into this form, Burmy must have last battled at the beach or in a cave. If Burmy evolves, it will become a Sandy Cloak Wormadam.