The Banandium Root & It's Connection To The Power Of The Stars Hypothesis
So this is a post I wasn't sure of what to call the title, but after I eventually found what I should call it to avoid spoilers in the title.
So as you should know the core of the Mushroom World is the Banadium, and can grant people's wishes. This all seems to be connected to the Power of the Stars aka Star/Wish Magic. So as established in previous posts, the Stars hold the Power in the Mario World with their Star Magic which they use to grant wishes. But also how Power Stars and Power Moons are the same thing in different forms.
But one thing is it always starts off with a Star Kid or Luma, and here's something interesting. As established in Super Mario Galaxy one of the transformations a Luma can undergo is the transformation into a planet. This would mean the Mushroom World would have been a Luma itself at one point. So my hypothesis is the Banadium Root is basically the core that represents the Luma, and it's wish granting powers is Star Magic. This is would also explain why it responds to a character's wishes. The Banandium Root itself is just taking on a specific form in this case, similarly to what we see with Power Stars.
This would also explain the golden appearance of the Banandium Root, it's golden just like a Power Star. So yeah, I think the Banandium Root has major connections to the Star Magic that makes up the Mario universe. Written by Eris