Notebooks are a quest item that you have to obtain from certain locations in order to progress the main story in Stray.
If you think a cat can’t play basketball, then you got it all wrong in Stray. In fact, you can even get the Boom Chat Kalaka...
The Poncho is an item you get for Elliot in order to fix a necessary gadget that you need to further progress the game’s storyline later...
The Cat-a-Strophe trophy is one of the many trophies you can earn in the game. This one involves playing a game of Mahjong.