(Note: This does not include the tv show, the movie, and some side games.)
(Note: This is my version. Please don't blame me if I get anything wrong)
This is the storyline of the mario games. Read the notes up top before beginning. This will put the games in order that they happened in the Mario universe.
1. Yoshi's island.
Yes, this is the first Mario-related thing that happened in the mario universe. Mario has been born a few days or hours or minutes or seconds ago. Bowser tells kamek to kidnap baby mario and baby luigi. Kamek succeeds with Luigi, but with Mario, he fell just out of her reach onto yoshi's island. More specifically, onto a green yoshi's back. This make Yoshi one of the first faces Mario saw. Yoshi then decides to carry baby Mario and find baby...
Mario: "Wait!"
Me: "What?"
Mario: "I wonder if that's the same yoshi that I met in space."
Me: "Probably."
Mario: "Gotta go! I have a yoshi to thank!"
Me: "Ok then, onto the next game."
Luigi: "Wait!"
Me: "Now what?"
Luigi: "You forgot to put my name at the end of the paragraph."
Me: "Oh yeah."
Luigi.
Me: "Ok. Happy now?"
Luigi: "Yes."
Luigi: "I also have a yoshi to thank. See ya!"
Me: "Ok. Onto Yoshi's Island DS!"