Where “Super Mario Maker 2's shared-course boom” started

Nintendo, on Retail, Jun 28, 2019. It reached 5 platforms in 6 months.

LineageKey steps, 9 of 15. Lines follow time and platform
iSpotBefore the first postNintendoFirst postPeak proxyCommercialPlatform jumpPlatform jumpOwner responsePressAfterlifePatient zero