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One thing I experienced is that once you increase the stats you cannot lower them even if you change the HEX value back to the original value. Anyone else try this and can possibly debunk?
Is there any way to modify values for the save file like how many items you have or the materials?
Inf gil and all that is kind of a waste of time because this game is so friggin easy, it's the grinding I don't want to do.
I used Jappi88's save editor 3.5 and tried editing it myself, and get data is corrupted error. I am thinking the updates blocks this editing feature.
Just wondering would it be possible to do the same thing for Final Fantasy XIII the first one. CP and gil max?
The following is a bit long, but here I document steps I was taking as I took them so they might help others.
When I changed the "First line on the left column" 4A27D from B8 (11 Elixers) to FF I end up with 70 Elixers; and at the same time changed the "First line on the right column" 4A28E from E1 (2 Phoenix Blood) to FF I end up with Unknown Items. If I change it back to E1 it is back to 2, but is still an Unknown Item.
If I change the "First line on the left column" 5531D to E1 my 1 Mana Essence becomes 138 and all are usable. If I change the "Second line on the left column" 5533F to C1 for Potent Boosters there is a strange error. Under items it reports as 127 Potent Boosters, but the Crystarium says there are 1277. When a0ttempting to use them for it gives an error saying that there are not enough making them essentially unusable. As a result of the above changes something else happened. The "First line on the right column" 5532E was already C1 and I didn't change it, yet it ended up changed to an unknown item of a very large number.
My supposition is that there isn't a given hex value means something different to different items and/or different positions.
I reverted to a backup, arranged the items again, saved and went to change the values again.
Here's where it get's weird. Although the number of Elixirs have not changed (still 11), and although the position is the same (top left), the current hex value is 45 for 11 items, when it should have been B8. Similarly, the values for the Mana Essence now show up as C1 already. I decided to change just one item, the Elixir, to FF and this time it showed up as 209 Elixirs. (Interestingly, the item to the right of it - the Phoenix Blood, changed to 2 of an Unknown Item. Even though I didn't change it's value at all it was affected by a change of value in the item directly before it) This time I saved without rearranging any items, went into the Colosseum, and tested to make sure they worked in a battle. I then quit without saving and exported the save.
Looking at the save file the value for the Elixirs still reads as FF so at least I assumed (wrongly) that it's because the value won't change if you don't rearrange anything.
I restored the save again to the point where the value of 11 Elixirs was B8 and the 2 Phoenix Blood still existed only this time I didn't rearrange monster items and just left it alone. Changing the B8 to FF (top left item, Elixir) and it became 70 Elixirs, while the 2 Phoenix Bloods became 2 unknown items. Reverting again to when the 11 Elixirs was B8 and changing it to C1 resulted in 64 Elixirs and the Phoenix Bloods again becoming Unknown items.
So far a few things are pretty clear. First of all, there is a level of Encryption at work. Secondly, changing the hex values of just one item can cause the item whose hex values fall directly after to turn into an unknown item even if the first item doesn't go above it's normal maximum. The simplest solution would appear to be placing a "junk item" in the position adjacent to the item you are editing and to only edit one at a time.
To that end I tried again, this time moving the phoenix blood to the second line, right column and putting potions in it's place (who need potions by chapter 4?) and in monster components I placed Mana Essence in the top left position, and a Power Sliver in the top right. Under the current configuration the 11 Elixirs has the hex value of 4A, and the 1 Mana Essence has the hex value of 80. After changing both to FF I ended up with 102 Elixirs and 66 Mana Essence. As predicted, both the 25 potions and 1 Power Slivers became unknown items.
I then tested to see what would happen if I purchased a potion. As expected, 1 new potion appeared at the end of the inventory so "junking" common items won't prevent you from getting more.
I then put 2 Phoenix Blood and 11 Potent Crystals in their own top left positions, leaving the top right positions occupied by the unknown items. The hex values for the 2 Phoenix blood items were 43, and the 11 Potent crystals was 86. I changed both to FF and I ended up with 102 Phoenix Bloods and 66 Potent Crystals. The unknown items in each are still unknown.
For some reason, even though I rearranged the items, the value for what each item does hasn't changed. The question is why didn't it change? I then realized that there are two ways of saving the game. Saving outside of a shop through the start menu resulted in no change, so what if saving in the history menu changes it? To confirm this I put 2 potent boosters and 3 Unicorn Horns in the top left position, leaving the unknown items in their position and saving in the history menu. The hex value for the 2 potent boosters was BC, and the value for the 3 Unicorn Horns was AA. I changed both to FF and the result was 205 Potent Boosters and 182 Unicorn Horns.
After testing to make sure the items work and to be sure it wasn't a fluke I put 5 each wound potion and vitality generators into the top left positions and I saved with the start menu, this time from Serendipity (not the DLC one). The hex values for the 5 wound potions was A7 and the hex values for the 5 vitality generators was E4. I changed both to FF and ended up with 182 wound potions and 205 vitality generators.
So I pretty much figured it out. The hex values for each item place has an encrypted value. Each item has it's own encryption value so using the same hex value in two different places will result in completely different values. Furthermore, there is a tendency for some information from a previous item to spill into the one after causing it to become unknown. All together this means that when editing items you should only edit one in each category at one time, and only on the left column as the right column is more likely to be damaged. The right column should always have an item you are willing to loose. Each time you create a new save file (or overwrite the old one by pressing square in the history menu) a new random encryption value set is generated so if you find values that you are comfortable with never save in the history menu or you will have to start over.
This suggests that there is some constants file keeping track of what hex value means what. That means that if someone can at least find the location of their file and successfully restore it after it has been changed through saving that person could then map out what each value means for them and an editor for items could be made that would swap this file before editing hex values.
Oh, and I am using PS3 EUR version of FF13-2. And if anyone is curious the reason I want to edit the save isn't to make the game easier - it's to keep the game from getting too easy. By spending so many hours farming monsters for items I have been leveling up too fast for the point of the game I am in. The only exception to that is the Elixirs, which I can get quite easily from the Chocobo races, but is getting rather tedious.