For @Cotton_Scratch and the Cat-Gen collaboration project. There are 24 fur color costumes. 12 are the short fur and 12 are the long fur outlines. They are assigned to letters a through x. There are 6 pattern costumes. 3 are the short fur and 3 are the long fur outlines. They are assigned to letters a through f. For a cat to have no pattern, put a letter/symbol/number that is not an assigned letter in a save code. There are 17 eye color costumes. These are the same for both cat outlines. There are solid colors, including several unusual cat eye colors(like excessively bright colors, pink, and purple), and heterochromia options. They are assigned to letters a through q. Every one of these characteristics can be expanded to include every letter, symbol, and number 0-9 when using a simple save and load code that cannot detect capitalization or multiple characters that identify a characteristic. Every fur color and pattern added after these originals, if more are added by some other collaborator, should be compatible with both the short fur and long fur outlines.
