Luigi and Yoshi arrived in front of the über-famous Luigi's Mansion. It was exactly the same as it was during those past few games where Luigi'd gone ghost-hunting: it was still scary, still clearly mostrando signs of abandonment, and it still was infested with Boos, spooks, and all sorts of ghosts.
Luigi shivered.
"What's wrong, pal?" Yoshi asked. "Haven't tu gotten used to all this?"
"Probably still not," he replied in a barely audible voice.
"Come on—you've got an upcoming game soon. What was it called again? Oh yeah—Luigi's Mansion: Dark Moon. And I heard your handy Polter-something's getting an upgrade 'cause ghosts in your new game aren't vulnerable to flashlights anymore. I'm sure one más game can toughen tu up, right?"
Luigi gulped.
"I think this is a good chance to tense tu up for the siguiente Luigi's Mansion game."
Luigi glared at Yoshi. "And you, pal? What about your up and coming a-game called Yarn Yoshi? I heard there's all sorts of whatnot coming up in there."
Yoshi's eyes widened innocently. "Cool—I have a new game coming, too?"
Luigi stared at Yoshi with disbelief. "You know about my games yet tu don't have a clue about yours at all?"
Yoshi shrugged.
Luigi groaned. "Well, that's just a-great."
"What are tu boys doing here?" a voice called in the darkness.
Yoshi strained to see who was the figure lurking among the shadows, but soon the person began to move—and finally emerged from the shadows to reveal himself.
The figure who revealed himself appeared to be short, probably and likely even shorter than Mario. He also appeared to be of age, with wrinkles here and there. He wore a lab capa and sported those odd bifocals, so it was obvious he was a scientist of some sort.
But, Yoshi wondered, just who was he?
"Oh, it's Professor E. Gadd," Luigi said, answering Yoshi's mental question, his voice sounding oddly distant.
Yoshi turned beside him to see that Luigi was no longer there. He was confused, wondering where the green plumber had possibly gone.
"I'm up here, Yoshi."
Yoshi looked up above him to see that Luigi was on the tree, perched on a árbol branch. Yoshi looked at him with mystified eyes.
"I just a-got a bit surprised, that's all," Luigi quickly explained before Yoshi could ask.
"Who's this Professor What-Got?" Yoshi asked.
"That's E. Gadd to you, my green dinosaur friend," the short old man corrected. He offered his hand. "I am Professor Elvin Gadd. Just call me Professor E. Gadd, if tu please."
Yoshi looked at the hand offered to him, then he took it and shook it once.
"Uh, hola there, I'm Yoshi..."
"I must say," Professor E. Gadd dicho as he looked up; Luigi still hadn't come down from the árbol branch he was perched on. "Get down from there, tu mustache'd fellow. You're gonna get yourself a broken bone for sure."
"Okay," Luigi dicho as he tried to mover his leg aside to be able to oscilación his way down. He failed miserably, and ended up falling from the branch and landing on a nearby bush.
"I'm okay," Luigi said, spitting out some of the leaves that were caught in his mouth.
"What are tu two green rascals doing here?" the professor asked, obviously just as bewildered see the duo as they were when they first saw him.
"We're here to enter the mansion," Yoshi said, very straightforward about it. "Mario and the other people in melocotón castillo were kidnapped, and we just recently got a clue to head here."
"Off ghost-hunting, huh?" Professor E. Gadd said, very sceptical about it.
"Yeah, somewhere along those lines."
"Well, the place has been increasing on paranormal activity lately, so it would be nice for tu two youngsters to do the job." Professor E. Gadd then eyed Yoshi and turned to Luigi. "Luigi, my boy, maybe tu should give the little green guy a quick tutorial on Ghost Hunting 101. I'll meet tu at my lab after about roughly three hours o so. I'm sure tu know where it is."
"Why 'after three hours'?" Luigi asked.
"Because I'm planning to do something for the sake of ghost-busting research, my lad. And three hours is long enough for tu to teach your friend there." Professor E. Gadd gestured to Yoshi.
Yoshi watched as the professor turned around and walked away toward his lab, wherever it was. Then he turned to Luigi.
"So, Yoshi, ready to learn the basics of ghost hunting?"
Yoshi smiled with much determination. "Ready, teacher!"
Both of them laughed.

**Original FanFiction Chapter link: link