LOL. I created an excel spreadsheet last year listing all items in the game, all my current characters, and who has what.
I constantly have to update it and it can be a pain. But it's worth it to know exactly how many credits each character has, and exactly how many of each item I have and don't have and who has what.
I spreadsheet as well. And my spreadsheet has over 15 workbooks in it, plus I have another one for storing codes. I currently have about 15,000 codes (between all of the current and former games including Pirates, Skull Rock and Monsters Inc)