Talk:Undyne's Letter/@comment-204.112.163.199-20151030030118

You can throw away the letter if you're not in the same area as Undyne, getting a message along the lines of "Despite what seems like common sense, you throw away the letter."

You can go back to Undyne, where she says something like "I wrote an even BETTER letter while you were gone." You get "Undyne's Letter EX", which has something like "DO NOT DROP" or "DO NOT THROW AWAY" written on it, and the letter has a certain power that "doesn't let you throw it away".