There's also a handful of free games that come with the console, so you're not limited to people who own the same games. There was a puzzle one where you got a

There's also a handful of free games that come with the console, so you're not limited to people who own the same games. There was a puzzle one where you got a random starting piece, and you could copy one piece from each person you passed that they owned. Sometimes you'd go past someone with the entire puzzle, sometimes you'd already have all the pieces someone else did (which is kind of fun in its own right). I miss that there's nothing like that on Switch, but it was not great for the battery life. (actually, on the original DS there was a game called The World Ends With You that implemented this feature at the game level, too. OS-level is a big improvement, but it was still neat there, especially since it gave you a bonus even for passing DSes that didn't hvae the game running)