Alola Form: Paras

Here's my take on Alolan Paras!

Upon migration to the new region and the different climate, the mushroom brainwashing their mind dries out and let them free. For a brief period, at least.
In fact native Morelull and Shiinotic see an irresistible prey that can't be turned down; so they infect Paras and Parasect with their spores and use them to spread across the region. Paras and Parasect get rid of the Grass Type, becoming Bug/Fairy. They can use bioluminescence to roam in the dark and to scare off enemies.