Samus Aran is the main protagonist of the Metroid franchise, also one of the eight protagonists of the Subspace Emissary. She is a bounty hunter hired by the Galactic Federation to defeat an evil race of criminals called Space Pirates.
After being separated from his brother after falling through a portal to the Mushroom Kingdom, Mario must partner with Princess Peach to save both Luigi and the whole of The Mushroom Kingdom from the clutches of Bowser, The King Of The Koopas.
