There's also a valuable method for this which doesn't require charles but only cheat engine. Got me tons of crystals this way
>Open Cheat engine
>Open Terra monsters
>Search for your proccessor i.e googlechrome.exe or adobe_flashplayers, etc...
>Go into shop in terra monsters
>go to Crystals
>Change the amount you want to buy in stack (i.e 1-10 change it to 10 for easier walkthrough)
>Search the number of cash it needs (meaning how much the thing wants you to buy at that specific item, i.e super crystal 4967, search 4967)
>Decrease the amount you want to buy and search again for the changed cash
there should be at least 1 or 2 addresses.
>Change the item amount back to 10, the addresse value should change accordingly, record those addresses, and change the value to 0
The item should now be buyable at 0 cash.
Works with honors also