Make only Pikachu available from the start. You have to capture other characters if you wanna use them.

That's actually a cool idea. The circles could be platforms.

But it's not as simple as "two floating platforms". They're supposed to represent distance in 3D, with the lower-left being closer to the screen and the upper-right being further away. So we'll need a mechanic to go back and forth between them, like in Smash 4's Jungle Hijinx.

Give every stage the foreground-background gimmick ala SSB4 Jungle Hijinx.

Make the camera of every stage fixed in place and zoomed all the way out by default

made an adjustment. Have fun playing while zoomed in on

Add a first-person view mode

Add a second person view mode

Add a fourth dimension mode

Add a one-dimensional mode but in 3rd person view.

Add a zero-dimensional mode but in 1st person view.

simulate 3d with a fisheye lens effect

revamp the game into a 3d fighter ala pokken tournament's field phase

replace every fighter with characters from my future game series

Make it impossible for Wario & Waluigi to damage each other unless no one else is left in the match.