I was curious what stage they would pick for Min Min. It makes perfect sense that they would pick Spring Stadium. I definitely remember it when I played Arms.
The stage is set up pretty simply, the main part of it is very similar to a battlefield setup. But they are platforms that set it apart from the others.
When the platforms turn green, they are ready to go.
You can use it to attack enemies above you.
If you miss, you still get some major jump air. Even giant characters like Bowser can be jumping as high as Sonic.
By far not the greatest stage in the game, but a good one.