Buy a full stack of emery flower seeds. Sell them right back. Repeat three more times. Then, buy just one pack of emery flower seeds. Sell them right back. Buy one wine. Sell it back. That's really close to a million gold lost.
I'd think that a similar AR code could get rid of it. If it's just a code to set the amount of money the character currently has, rather than a code to adjust how much things sell for, then all he should have to do is change the value to something more reasonable. It's been a long time since I've used any sort of device like that (last time, and actually the only time, was during the PS1/Saturn/N64 era), but if they still work roughly the same way, then the number it's being set to is probably the last number on the code. Just change it to something more reasonable (just remember, it's in hexadecimal, not decimal.)
Or he could just not save after using the code. The codes generally won't make any changes to the saved file until it's actually been saved after the code's taken effect.
If that doesn't work, though, and he wants to blow like 96 million gold, that'll take a whole lot of emery seed packs. XD
Its ok I just accidenily deleted his game sooo im screwed.... due to our agreement on whitch we both swore that if we delete one others game we must then delete our own games sooooo i had to delete mine.........
"Honor can be a real burden sometime"-Angeal FF7 Crisis Core
Thanks for all your help guys I wil be back as soon as I remarry Julia.