!This page contains spoilers about Mementos. Proceed at your own risk.!
“ Sometimes cats will leave behind mementos for you to view and treasure. You'll need to become good friends with a Cat before it will give you a memento. No need to pet or poke your cats or anything. Just keep giving them tasty snacks and they'll bring you their mementos when they're ready. ”
- Neko Atsume, How to Play
According to the original game's info, a Memento is a proof that we have become a cat's friend.
After a particular Cat visits multiple times and if you leave delicious treats, it may reward the player with a gift, a treasure. Each cat has a different one!
The obtaining of the Memento is preceded by a special event: when the player opens the Neko Atsume app, the screen is suddenly dimmed out and a cat will walk in the middle of it, or simply appear in the middle in the case of Rare Cats, giving the player its personal gift.
Once a Memento is received, you can view it by tapping the cat from which it was received. Each Memento is stored in the Mementos tab, in the Cat Menu.
Mementos are totally random. The player can get one after a few visits, or even after more than 100 visits.
Unlike other Mementos, Hermeowne's memento can be activated through the Mementos tab. Activating it will make cats appear in an empty yard. Its sprite will change depending on how many times it has been used.