Pokémon Forms

Pokémon Forms are variations between individual Pokémon, these variations may be different in types, ability, stats, or learnsets sometimes forms are purely aesthetic. Pokémon Forms are first introduced in Generation II with Unown but purely aesthetic. In Generation III some Pokémon forms begin to bear differences in types, ability, stats, or learnsets with Castform (weathers effecting its typing) and Deoxys (stats and learnsets variations among forms however Deoxys' forms are version locked until Generation IV).

Burmy and Wormadam

 * Burmy


 * Wormadam

Shellos and Gastrodon

 * Shellos


 * Gastrodon

Puedo-forms
Puedo-forms are not official Pokémon Forms but rather variants changes that are purely aesthetic or it can change effect typing and attack's typing. There are currently three Pokémon with Puedo-forms: Spinda, Arceus and Genesect.

Gender differences
These variations are purely aesthetic between the Pokémon gender and they are not classify as forms (with the exception of Nidoran♀ and Nidoran♂ groups which are two different species of Pokémon).
 * also known as sexual dimorphism

Shiny Pokémon
Shiny Pokémon are colored in a different coloration than it normal usual colors also Shiny Pokémon colorations are purely aesthetic however these Pokémon's summary does have a special icon indicating its special coloration status.