The next day…

At the Mario brothers house…

Luigi stood just inside the front door, fully costumed, and armed with a fly-swatter, a water pistol, and a bent Frisbee, "We'll find out for sure what that shy-guy is up to today!" He said, waving the fly-swatter in the air.

Mario poked his head out of the kitchen, "Not today, Weege. You promised to be at Yoshi's birthday/karaoke party, remember?"

"Huh?" Luigi lowered his fly-swatter as he slipped into flashback mode…...

"Yoshi, yo-yoshi. Yoshi?" Yoshi asked.

"What was that?" Luigi leaned down slightly, as if that would help him understand.

"Yoshi, yoshi! Yoshi-yoshi yoshi?" Yoshi bounced up and down, gesturing with his hands and tongue.

"Ooh! I love this game! Um, a rabid squirrel?" Luigi guessed, "No? Er, an elephant having a heart attack?"

"Yoshi!" The green dinosaur handed Luigi a card.

"Hm." Luigi opened it, "I'm invited to your birthday/karaoke party next week? Sure I'll come!"

Yoshi jumped for joy, "Yoshi!"

...… he slipped back out of flashback mode…

"Oh, yeah." Luigi dropped the fly-swatter and took off his detective hat, "I guess I got distracted by all this purple shy-guy business and forgot." He sighed, his shoulders drooping, "I guess we can pick up the case again tomorrow… Keep your eye out for that shy-guy… I'll see you later, bro."

"Don't worry; I'll watch for him." Mario assured his green-clad brother, "You just head on off to that party and have some good, non-purple shy-guy fun."

Luigi shed the rest of his costume and hurried out the door.

The door swung closed, and clicked shut behind him.

"YESSSSSS!" Mario leaped into the air, performing a perfect quadruple backflip with an inch and a half-quarter turn corkscrew, landing upright in the hall, "A day without Luigi obsessing over that purple shy-guy!" he took off eagerly down the hall, "Now I can finally get some work done!"