Alternate form
Alternate form is a variant of one species with a different appearance, and sometimes different types, stats or ability
Gold and Silver introduced Unown with 26 letter forms; Ruby and Sapphire added two punctuation forms for 28. Deoxys changed form by game in Generation III. Platinum gave Rotom five appliance forms and Giratina its Origin Forme.
Main-series games; introduced in Generation II, Gold and Silver.
2 later changes
- Ruby and Sapphire added Castform's weather forms and Deoxys's per-game forms.
- Platinum added Rotom's appliance forms and Giratina's Origin Forme.