So I was surfing the Romhacking.net forums a few days ago...and apparently, someone named "Cirosan" released this!
https://www.romhacking.net/hacks/3961/
That's right. Patch that puppy, and you'll always go through the Prologue on all difficulties! And if you want, you can use the version of it that also gets rid of Gaiden requirements. No more having to kill off your characters!
You'll wanna be careful though; H5 Prologue is no picnic. The guy had to make some drastic changes to Prologue I and II just to make them possible. Giving Marth a Vulnerary at the start, making certain enemies drop Vulneraries, and even changing the class and equipment of some of those enemies...those are all things he did. And even then, the difficulty was still comparable to Lunatic Reverse on FE12...
...
Course, on the other hand, Chapters 1-3 end up being a lot easier; to the point where my Marth was doubling the Chapter 1 pirates .
But yeah, anyone else hear of those?