I think the Pokémon series needs to stop explaining why the Pokémon are big. Mega, giga, tera, whatever – in the next game it’s just called Big Pokémon Phenomenon, and its full explanation is “sometimes Pokémon are big”. It’s not a plot point, they’re just there.
In Paldea, ‘sprigatito fur’ is a common scent name for laundry detergents and air fresheners. Such products always carry the outdoorsy, fresh smell of cut grass and flowers - despite the fact that sprigatito does not have an inherently floral scent at all. Many other grass types, such as petilil and gossifleur, are noticeably fragrant, but sprigatito only smells like most feline pokémon - warm and a little dusty. Nobody is quite sure why the name persists.