After a cat visits you a few times, it may give you one of its treasured items: a memento. These can either be items only a cat could enjoy, such as acorns or seeds, or more practical items like a rolling pin. Often it’s the former.
There is no telling when a cat will give you a memento! Some will give theirs to you after only a few visits, while others will take dozens. It is completely random, which is the biggest reason it takes so long to complete your memento collection.
The cats are listed in alphabetical order below, including rare cats. Despite their mementos seeming insignificant, you definitely get a better feel for each of the cat’s personalities through their mementos. That’s part of what makes Neko Atsume so fun.