Here's a file right at the start with all characters unlocked:
http://www.mediafire.com/file/qle88m3aym3cdv3/save1.zip/file - literally none of the game's flags have been triggered except for the intro and talking to akyu for the first time. As soon as you load it you are gonna get loadsa achievements and some cutscenes for having all characters.
I've had a half-finished and slightly iffy cheat engine table for the game sat on my harddrive for best part of a year that I used to make that save. It's been broken since the last patch so I've been waiting for the promised overflow-fixing patch to be released before taking the effort to fix it up and release it. I'm starting to think that it's never going to happen, so if there's some interest in it I might take the effort to fix it up and release it for this patch.
If anyone is interested, at present it can edit:
For all characters:
Current Level
Total Experience
Current Subclass (so you can have multiple Murakumos/Dragon Gods/Winners)
Available Skills/Spellcards/Subclass skills and their levels (Max you can have is 60)
Gems/Jewels/Skill Books used
Equipped Items (the game refuses to show plus disc items until you beat the main game but you can edit them in manually here if you want)
Current Money
Number of Battles completed this run
What items have been collected and their quantities
Characters recruited
Current X/Y pos on the current map
Temperature in the Fire floors
Current Infinite Corridor floor
Infinite Corridor bonuses (e.g. Drop Rate +10%)
7 Stars/Renmants
Encounter rate
At present the memory locations have to be updated every time the game starts because the game doesn't statically allocate much of its interesting memory. I can fix it by finding pointers instead of using raw memory addresses, but it's a huge pain to do so (hence the waiting for the next patch).
Even with the pointers, the editing skills is a bit iffy - the game seems to use the memory locations I've found as a cache but writes to them every time you change screen. In order to get any changes to stay past a screen transition you have to use the freeze value function (hitting space) in cheat engine. Skills that directly increase stats (including Maintenance) seem to not work, but everything that takes effect in battle does. The game also saves all of the levels of your customised skill set correctly so provided you re-edit the correct slots. I also know there's one or two skill values in the table that are wrong and will crash the game (I started from a text dump of the skill ids I found and it had some wrong values in it), however finding them is a pain.
Anyone interested?