Little bit of effort involved here, so expecting some cold votes, but hopefully it'll help out some people.
The Japanese demo of Puyo Puyo Tetris is extremely
generous; it includes multiple characters and multiple game modes, including local multiplayer
. Another nice bonus is that it's HD Rumble compatible.
And it's pretty easy to download, seeing as the Nintendo Switch is region free:
1) Create a new Nintendo Account using this link: https://accounts.nintendo.com/
2) Make sure you set your country as Japan
3) On your Switch console, create a new profile and link it to your new Nintendo Account
4) Go to eShop on your Switch and select your new account
5) Find Puyo Puyo Tetris and on the right you'll see two boxes outlined in red
6) Choose the lower one which is slightly smaller; that's the demo
7) Hit 'A' and you'll start the download
The game is great fun and there is plenty to do in the demo. Enjoy!