This is never explained. The Mushroom Kingdom's entire population seems to consist of hundreds of nearly identical, mushroom-capped citizens, all of which are named Toad, with some of them having different names, personalities, and clothes.
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I'm sorry, but the toads that you can play as are simply blue toad and yellow toad.
The mushroom power ups are called super mushrooms. The mushroom people are called toads.
it has never been revealed if Yamcha has a last name or not.
waluigi wario is his last name
It is never revealed if he has a last name or not.