With this save file, people without a cheat device can still check out the "Debug Room"!
PlayStation DexDrive Save (North America)
I used my GameShark Pro to search around a little bit and found 2 hidden options.
The first one, was the ability to save. Normally, you cannot save or load up a game in the debug room.
The second is a hidden 'get weapons' activator. It's not that good though, the main difference between the hidden one and the visible one is that the hidden one does not unlock 'Tune up' and 'Dist. BP'.