Life is pretty sweet for Mario in the Mushroom Kingdom. He gets to eat flowers that give him magic powers. A weird gravity level allows him to jump at tremendous heights. He can fly for God's sake. He's a middle-aged plumber, he dresses up as a bee and no-one asks any difficult questions.
Transfer Mario into the real world and shit gets a little too real.
He can't jump. He can't eat flowers without consequence. He can't kick a green shell without people acting perturbed.
Life is tough in the real world for Mario.