In addition to these amiibo now natively supported in-game with no bugs (even if you uninstall the mod, the costumes will be unlocked), all costumes including Event Courses are now accessible without connecting to the internet! Loadiine and CEMU users rejoice!
Get the Super Mario Maker BOSS NFP Pack here!
I am working on finding a way to apply this patch to the NAND on Wii U, but there has been no luck on that front. This is compatible with CEMU (without Toon Zelda or Totem Link), Loadiine, SDCaffine (with FSHax) and regular Caffiine!