But it’s SOOOO COOOOOL. I do this too. I think the back of the SMB3 box started it.
Oh man! SMB3 and it’s back of the box shenanigans
That stuff is great :‘3 They did the same thing with Twilight Princess, if you look on hte back of some boxes one of the screenshots has a magic meter, and in game it’s possible to, some way or another, get a jar of green slime which doesn’t do anything if I remember correctly.