This universe came about because they would design fun gameplay first and then write an absurd story around it.

The “reasons” for things were usually dictated by gameplay and the stories reflected that.

It’s why Katamari Damacy is one of my favorite games, because it took that notion and really ran with it. It’s story is as absurd and over-the-top as the gameplay of rolling up objects to make stars in the sky. The gameplay is absurd and not in any way reflective of any reality except the reality of the game world itself.

The Mario series has always kept that ethos as well. The stories have grown and changed as long as the Mario gameplay has, each a response to a new set of moves, and at one point the move from 2D to 3D, all of it forever changing the path forward and the details of the canon Mario universe.