Btw in the link it mentions the word 'Kantonian'. How cool does that sound.
Imagine if they were forms for the other regions.
 - Kantonian Form
 - Johtonian Form (or maybe Johtan given that 'Alolan' isn't 'Alolanian')
 - Hoennian Form[citation needed] (it could probably just be 'Hoenn Form' like how sheep is the same when it's pluralised idk)
 - Sinnohnian Form (that just looks weird)
 - Unovanian Form (THAT SOUNDS AWESOME)
 - Kalosian Form
 - Alolan Form