That trailer (and
the game's website) point to a Nintendo eShop version of the game, but if you search for that version at time of writing - in the US or Europe - the
eShop returns no results, not even a 'Coming Soon' entry.
Even stranger, the game was released on the US eShop last week, but only for a few hours, before being unceremoniously pulled from sale and its listing scrubbed from Nintendo's digital store entirely.
Physical copies of Cookstar are a different story. According to some very pleased/confused Redditors,
copies have quietly appeared in select US outlets of Target. Amazon
only lists third-party sellers (at least one of which seems to have been
set up solely to sell this new Cooking Mama game, strangely), implying the retail giant has no copies at all.
In Europe, the game is seemingly impossible to get a hold of right now, and is listed by several retailers
for a release later this month - but none of them seem to agree about when. Don't even get me started on the apparent PS4 version of the game, which
is listed for sale across the internet, but hasn't been outwardly mentioned by any official source around 'launch'.
Cooking Mama: Cookstar is, in essence, Schrödinger's Video Game, seemingly existing and non-existing simultaneously, with neither state particularly easy to prove. Can you tell I've been looking into this for too long?