LogFAQs > #885874660

I believe the only way to get giant Mario in Super Mario Maker was with one of two Amiibo.

http://www.ign.com/articles/2017/07/29/metroid-samus-returns-fusion-mode-is-amiibo-exclusive

The new squishy Metroid amiibo not only lets you reveal the location of nearby Metroid on your map, when you beat the game it will also unlock a new "Fusion" difficulty mode where Samus has her suit from Metroid Fusion. In addition to the squishy Metroid amiibo, a new Samus Aran amiibo will launch alongside the game on September 15. This figure unlocks an extra energy tank, as well as a Metroid II art gallery when you finish the game.

The Zero Suit Samus and classic Samus amiibo that are part of the Super Smash Bros. amiibo line also have special functionality. The former unlocks a bonus energy tank, as well as a Sound Test mode when you beat the game, and the latter unlocks a missile tank, as well as concept art when you finish the game.