A/N: This has been almost completely retyped, I have removed period problems and formatting errors. Things will have been added and/or removed but if you are reading this for the first time don't worry, nothing important is gone.
DISCLAIMER: I don't own Super Mario Sunshine or Nintendo Characters and stuff, if I did this wouldn't be a Fan fiction!

Super Luigi Sunshine! Part 1; The Beginning!

^Early Morning - Mushroom Kingdom^
Luigi laid in his room of the castle thinking angrily, soon their plane will be going to some holiday resort place without him just because Toadsworth wanted some Toad company and couldn't bare leave one out and there wasn't enough room on the plane unless Luigi learnt how to pilot… even though the plane was auto piloted…
"L-Luigi," A scared sounding Toad says from outside of Luigi's room.
"What!?" Luigi snapped, not looking away from the ceiling or getting off his bed.
"Ma-Mario wanted me to tel-tell you that him and the others are leaving and he-" The Toad started with a quiet voice.
"AND WHAT!?" Luigi yelled, "That he wants me to say goodbye to him!? Well tell him I hope he somehow has to waste the whole holiday saving Peach or some other horrible duty!"
"Yes Luigi!" The Toad says and Luigi heard it run off.

"-he told me to tell you that he wants you to waste your holiday saving the Princess or some other horrible duty," The Toad says worried at what Mario might say back to him.
"Tell him I-ah say goodbye," Mario says while he climbed up the stairs into the plane.
"Yes…Mario…" The Toad says eyeing Mario with a worried look. He watched Mario close the plane hatch door thingy and saw him (through the windows) make his way to his seat with the Princess and Toadsworth.
"Let's-ah go!" Mario shouts and the Toad heard Peach sigh while mumbling something about learning English.

^A few hours later^
Luigi was standing on a tree near the castle trying to vent out his anger in the safest way possible; throwing rocks into the moat around the castle. He had almost ran out of rocks when he saw Bowser's clown car crash into the ground. Sighing Luigi realised that he better go investigate, Bowser may be hurt. Luigi spun around and jumped off the tree and after gracefully landing he ran over to the crashed flying machine. He stopped in front of it slightly confused, It seemed smaller, 'maybe since it was mangled from crashing?' Luigi thought and then spotted a small Bowser-look-a-like shell inside the Clown Car.
"Bowser?" Luigi says slightly confused at his size. The shell quickly opened up and something jumped up and kicked his chin, knocking him over and onto his back. Luigi flipped up quickly and grabbed the Koopa by its throat and it looked at him. To Luigi it looked like what Bowser would look like as a child.
"Let go of me!" It ordered in a whiny voice while trying to struggle free from Luigi's grasp.
"Why?" Luigi asked.
"So I can take Mama Peach back to Papa!" The child-version of Bowser says.
"Mama Peach? Peach gave birth… to a Koopa?" Luigi says very confused.
"Of course not stupid! That's just a lie Papa told me so I would get Peach! Now let me go!" The young Koopaling ordered.
"So… I'm guessing Bowser's your father?" Luigi says thinking of letting go, "Then you're too late, Mario and the Princess just left to go to a Holiday island for one month."
"Papa Bowser won't be happy now that I lost Peach and the Clown car," The baby Bowser says with tears appearing in its eyes.
'Oh no… if it cries I'm going to have to do something or someone will notice,' Luigi thought worriedly, a plan then comes to Luigi...
"I'll help you get Peach if you help me get revenge against Mario for not taking me to Delfino Island!" Luigi says smirking, he really wanted revenge against Toadsworth as well so taking Peach would annoy both.
The Koopaling smiled, "Then we better get over to Delfino Island, my dad has a hidden facility there that we could use as a base!"

A/N: This chapter is tiny, it was small because I was just starting it off and thought that I should have a small Chapter.
And I know that Sunshine Chronologically came BEFORE Luigi's Mansion but this is a Fan fiction and I will change as many things as I want! (Edit: Actually it's theorized to come after, sue me I got something wrong)