N i g h t c h a n g e s z a y n l y r i c s. Natural Harmonia Gropius or more commonly known as N is a major antagonist of the Black and White versions. The ñ is a separate letter of the Spanish alphabet not merely an n with a mark over it.
Getting there isnt particularly easy as you need to time your jumps just right so as not miss your platform and fall to your death. While doing so type the letter N. The only letter in the Spanish alphabet.
Although experimentation could have revealed this answer the underlying function of n is a very good question to have asked.
This also works for other accent characters eg. The ñ is a separate letter of the Spanish alphabet not merely an n with a mark over it. If you hold down a it will reveal variations on the pop-up like à á â ä æ ã å ā. Was heißt so n Mensch.