There is already a bunch of codes for Dragon Quest VII, you can find them here.
Note that some of them might not work on Gateway as they were built to work with CTRPF's Action Replay (which have some extras codes).
Most should though.
Thanks, sadly theres no Code for all Items (with Story Items) in bag.
Actually i am just interested in the bumper Bonus ball item, which speeds Up vocation mastering.