Thread:ComicReadingGamer/@comment-5688420-20190102160455/@comment-26381576-20190104204732

Nope, you actually do start the game as Yoshi and you basically rescue the other three by finding these three keys with their hats.

Remember in the original SM64 game where in the room northeast of the first floor there was nothing but a stained glass mural of Peach which led to that sliding level? Well, now it's been expanded. There are now three doors that feature the first word of the three other characters, and that's where you use those keys to unlock them. Don't ask about the fourth blank one, though.