A long, long time ago...
A stork hurries across the dusky, predawn sky. In his bill, he supports a pair of twins.
Suddenly a shadow appears in a gap between the clouds and races toward the stork with blinding speed.
"THE BABIES ARE MINE!"
Snatching only one baby, the creature vanishes into the darkness whence it came.
The second baby falls undetected towards the open sea... (OH NO...)
Meanwhile, here is Yoshi's Island, home to all Yoshis.
It's a lovely day and Yoshi is taking a walk. "HUH?!" Suddenly, a baby drops in onto his back. The baby seems to be fine. This is very fortunate! "Wha-?" Something else fell with the baby... Let's take a peek...
It looks like a map. Maybe the stork was using it? But Yoshi can't figure it out. Yoshi decides to talk with his friends.
"AAAAK!"
Kamek, the evil MagiKoopa, and kidnapper of the baby, quickly dispatches his Toadies, when he discovers that he missed the other baby.
Yoshi heads leisurely back to the other Yoshis, unaware of the danger at hand. Kamek's forces are actively searching the island.
Will these two children ever reach their parents safely?
This paradise is Yoshi's Island, where all the Yoshis live. They are all in confusion over the baby that fell from the sky.
Wait! The baby seems to know where he wants to go . . . The bond between the twins informs each of them where the other one is. The Yoshis decide to carry the baby to his destination via a relay system. Now begins a new adventures for the Yoshis and baby Mario.
But... Things do not happen as planned.
Baby Mario is safely escorted through the island by the marvelous teamwork of the Yoshi Clan, however Yoshi was unable to locate the second baby. The stork, who had been held captive by Kamek deep inside Baby Bowser's Castle, had witness Kamek flying away with both Baby Bowser and the second baby in his grasp.
Unable to follow the MagiKoopa, and unwilling to risk losing Baby Mario again, the stork delivers the lost baby to his parents, alone.
The Yoshi Clan promise to keep searching the island for the second baby but years passed by without any sign of the baby or of Kamek...
Mario grows up, raised as an only child in both the Mushroom Kingdom and Brooklyn, New York. He remained unaware of the existence of his lost twin brother and retained no memory of his adventures with the Yoshis so long ago.
After arriving in the Mushroom Kingdom in an unexpected manner, Mario easily befriends Princess Peach, the Toads and the Yoshi Clan after his many adventures throughout the kingdom and its adjoining lands.
In this time Mario's rivalry with Bowser, King of the Koopas, had reached its peak. Mario would not allow the Mushroom Kingdom to fall or lose his dearest friend to Bowser.
War between Bowser and the Mushroom Kingdom was drawing nigh...