When I found out we were getting multiplayer vs, I immediately had the idea that I wanted to try making something reminiscent of the Mario vs Luigi battle mode from the original NSMB. I haven't had a chance to test this in a multiplayer environment yet(can you even choose levels when doing 'Nearby play'?), but if anyone wants to give it a shot, check it out:
GRY-RFP-HGG
The rules are simple: collect 4 keys and get to the finish line. There are 8 keys total, one of which is in the form of 4 pink coins.
The battlefield is a vertical stage, you start and exit in the center. Some keys are a little trickier to get. There are various power ups scattered around, and a couple of hidden stars. You can steal someone's keys by jumping on their head, hitting them with a shell, or eating them with Yoshi.
I'd love any feedback or to hear about any similar levels. Hoping to give this a go with friends sooner or later, once I get people with multiple Switches in the same room.