Here's a weird little glitch I noticed in PSIV lately. There's an item sold on Dezo, in Meese IIRC, called the Tornado Dagger. In shops and party inventory, it's listed as TORNDAGGER. If you use it as an item in battle though, it comes up as ORNDAGGER.
It's just a weird little typo, but I thought it was interesting. It means the item names must be listed twice in the game's code - once for shops and under a different listing for battles.