When you buy cat food for the kitties and you place it in the food bowl, you should exit the game for a while and the cats will come and hang out. When they leave, they usually leave behind either silver or gold fish as a thank you!
Mack is described as "determined" in Neko Atsume.
10 Gold Fish
The literal translation of Neko Atsume from Japanese is 'cat collected'.
A game similar to Neko Atsume where you collect dogs instead is Boku to Wanko.
Billy the Kitten and Mr. Meowgi have the highest power level (power level: 250) in Neko Atsume.
Tabitha is described as "leisurely".
Patches is described as "jealous".
Princess is described as "ditzy".
Spud is described as "cautious".
Shadow is described as "peculiar".
Marshmallow is descried as "aloof".
Cocoa is described as "indecisive".