A lot of cheats for this game (unlocking stuff) have been known for awhile now. However, the way they were done required profiles and they were "brute forced" instead of knowing what was really needed.
So for the past two days, I've been looking into how they work and found either more accurate data to patch in instead of blanket turning on all bits in specific memory addresses (the brute force I was talking about) or found better locations for things that do not require a profile to be unlocked.
Stages, characters +puzzle, alt costumes, plus all soundtracks and endings. I've even unlocked all of Shujinko moves and bios which was not ever found as a cheat previously.
Before, you literally had to beat Konquest and find the moves, bios, and finishers on two separate profiles to unlock this in order to play local Shujinko mirror matches which was a huge issue if you ever had local players who both played the character. This took FOREVER to do.
Now, all of these things are unlocked and there is NO PROFILE REQUIRED!
A tutorial of some sort is forthcoming, whether it be a video or a post. The latter is most likely as I don't have a camera or microphone lol