You were young Mario, a small skinny Italian guy at 4'11. You donned a big red hat that was definetly way too big for your head. Every time you moved it slipped down your face. But that's what usually happens when all the clothing in the Mushroom and Koopa Kingdom are made for Toads and Koopas. And both of those creatures were way taller and stronger than humans would ever be.
Humans were a rare and exotic species, often being kept as slaves or pets. Humans were very endangered at this point after years of hunting. Being a human, you were eventually captured and brought to the Mushroom and Koopa Kingdom. The Mushroom Kingdom and Koopa Kingdom combined after Peach and Bowser happily married. Luigi was sent to King Boo to be a pet and you were sent to Bowser and Peach to be a pet.
Peach and Daisy were Toads and Rosalina was a Goddess. Bowser was a Koopa. Pauline was apparently sent to Daisy as a pet. Hopefully the rulers would meet up soon...you yearned for human contact..
Right now you were in Bowser's quarters, peacefully laying on his bed. All snuggled up in his blankets. A small dog harness (or for better words a human harness) was fit snug tight on you, you also had pants but no shoes.
Knock Knock! Oh! Bowser must have come back early! "Hello little buddy, did you miss me?" He calls out with a booming voice as his ten foot tall figure opens up his door.
Yea, you forgot to mention that the room was gigantic, you couldn't reach anything! Which to be fair, it was made for a 10'0 giant koopa king!
And it was rumored Bowser was setting up laws to protect Humans; like laws prohibiting hunting them. Although he supported keeping humans as slaves or pets, so those wouldn't go away in a long time. And Peach also kept a lot of humans as slaves as well.