You do need WiFi to play Animal Crossing on the Nintendo Switch.
Here's why:
- Downloading the game: You need an internet connection to download Animal Crossing: New Horizons from the Nintendo eShop.
- Updating the game: Regular updates are released to fix bugs and add new content. These updates require an internet connection.
- Saving your game: Your game progress is saved to the cloud, which requires an internet connection.
- Playing online with friends: You need WiFi to play with friends online.
- Accessing the NookLink app: The NookLink app, which allows you to use your phone to scan QR codes and manage your in-game items, requires an internet connection.
While you can play the game offline after you download it, you won't be able to access all of the features.