Use code LPSTRU. This works for all 4 LSP DS games.
I e-mailed the company that programmed the game to get this answer. I do not know how to get the final accessory for the game which is what I'm...
The password: LPSTRU
You just type it in the options screen when you first start up the game and it is automatically unlocked. Then, just go to the Meow Market to add it to your collection. I had to...