Odd Things In Mario Games (includes sub-series)

If platinum is an element in the periodic table then yes, Metal Mario is made of that.

Rubidium, Radium, Cobalt, Tungsten, Titanium, you name it.
 
Yes, that too. Even nonexistent metals go in here.
 
Hey... we all have calcium and iron in our bodies. We're all part of Metal Mario.
 
Is it a nonexistent metal?

Then yes, it's part of Metal Mario
 
I agree. He can't breathe, but he can make sound?
 
The power of being unable to drown is moot in Mario Kart 7.