Bowser groaned as he got up. He managed to shield his kids enough they wouldn't be severely hurt. They still had some scrapes and bruises, but otherwise alright. Bowser looked up and grunted, forcing himself to stand. He watched as he saw King Boo fly off towards the mansion again. A quick turn to see Mario struggling to get up, Peach and Daisy supporting each other, while toads and Koopa troopas began loading all the ghost into a container the professor had brought with him, left him worried.
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Luigi ran around the mansion, his legs aching from moving around so much the last few hours. But he couldn't give up. He couldn't let King Boo destroy his family. He only ran a few distances behind the mansion when he got launched by a explosion. Rolling on the ground then getting back up, he came face to face with the ghost king.
 "You just don't know when to quit do you?!" He screamed. Luigi rolled his neck and smirked "Get it from my brother. It runs in the family!" He let out another electric charged wind burst from the poltergust with hit it's target. King boo began materializing bombs and magic blast forcing Luigi to duck and dodge. A singular blast managed to hit him right in the arm. King Boo cackled and menacingly floating his way. Luigi had began backing up, as a instinct. He backed up and he felt he reached the edge of the cliff.
 "Well well. My little plumber nemesis. It seems you are out of ground." The ghost chuckled, hoping to send fear into Luigi. Luigi was scared. That he would admit, but he never let it truly hinder him. His fear, to himself anyway, is what made him Luigi. Made him stronger. That, and also his family, they gave him the strength. Mario, despite his faults in the last few months, had been there for him since day one, Daisy being his partner in crime, but let's be honest, he's her partner, Peach was there best she can and Bowser... despite their past, he grew to love the Koopa king. 
That much they both knew. He grew to love the kids and the rest of the Koopa Kingdom even if he hadn't met everyone. Those he had met, like Terry, who became his personal guard and good friend, the chefs in the kitchen, the librarian, all his new family. This charged him up plenty. He gave his poltergeist a large jolt and it unleashed a large gust of charged air. King Boo countered with his own blast of energy. The beam collided, a visual spectacle to behold, as dangerous as it was.
 Bowser and the others saw the beams collided as they made their way to the back. He told the kids to stay with Kammy while Kamek came with him. Then out of nowhere, the beams struck the ground and dragged in a line and blasted a part of the mansion. Both looked tired, King Boo had floated down and his tongue fell out his mouth. Using the final bit of strength he had, Luigi sucked up the tongue tip with the poltergust, and slammed the ghost into the ground 5 times. He reeled in the ghost king, how had a look of anger and fear in his face. "This is what you get for messing with La mia famiglia, tu fantasma" Luigi said staring into his enemy's eyes. "Don't ever come after us again" and with that. Luigi sucked the ghost king up into the poltergust, and it spit up the gem from atop his crown. Picking it up, Luigi charged his thunderhand once more, and it caused the gem to break. Sighing in relief, it was over. They had won. Or so they thought.
Looking up, he saw his Koopa king, his brother and his princess friends running towards him, then a grumbling sound echoed through. The cracks in the ground from the fight, became more prominent. The ground started shaking and then started breaking. Luigi, as tired as he was, and the weight of the poltergust, began to run towards his friends and family. The ground was breaking faster with each step. Bowser could only watch as his queen ran for his life to get back to them. He and Mario both reached out steaming for Luigi to jump. With the energy he had, Luigi gave his best jump.... But it wasn't enough.
 It was as if the world had went into slow motion. Luigi watched as his lover's and his brother's hands were so close yet so far from his reach he could only watch their fear stricken faces as he fell, the water depts wanting to swallow him whole. He closed his eyes, sad he couldn't say goodbye to his family, and thank them for what they've done. 
Suddenly, it felt like everything stopped. Luigi slowly opened one eye and he was met overlooking the vast sea. Opening both eyes he looked up he saw Mario and Junior both holding his hand. "We got you Lou!" Mario said straining a bit. "Hold on, mama! We're gonna get you back up!" Junior said trying to pull a bit. Luigi looked up a bit more and saw Peach, Daisy and the koopaling create a person chain (couldn't really call it a human chain since only three were human but hey, no one's complaining) with Bowser and Roy at the top of the now broken cliff making sure everyone is stable. 
It began as a slow pull up, till Bowser decided to yank everyone up and everyone fell back onto solid ground, Luigi ending up on top of Bowser. When they sat up and opened their eyes, Bowser, surprisingly, was the one to start shedding tears. He tried to hold them back but he just let go. Luigi also began to let loose his own tears and began to hug Bowser. Bowser lowered his head to muzzle away the humans tears. Luigi grabbed Bowser's face and planted multiple kisses across it. "Amore mio..." Luigi whispered. "Watashi no ai..." Bowser whispered right back. "Thanks for saving me.." Luigi said, tears till in his eyes. Bowser chuckled wiping some of his tears and Luigi's. "I'd save you until I can no longer draw breath."
"Mama?" The two looked over to see the Koopalings looking to make sure it's all real. Luigi pushed himself off Bowser to greet the kids but Daisy vaulted over them and squeezed Luigi in a tight hug. "Oh my stars, your okay!" She exclaimed, her hip on the hug making Luigi turn red, trying to breathe. "D-dai.. can't breathe.." Daisy then let go, allowing Peach to give him a more gentler hug. "Thank goodness we got here in time." Luigi nodded the gently pulled away to look at his brother, hiding his face behind his signature red cap. 
 Walking over, he adjusted his brother's hat and pulled him into a hug. "It may take a while to forgive how you left that way, but your still mio fratello. And I love you." Those words broke Mario and he started bawling into his younger brother. "Mi dispiace.!" Mario repeated over and over. Luigi hugged his brother before letting him go to Peach to gather himself. Luigi went back and stood by Bowser and got on his knees and opened his arms to the Koopalings. 
 Junior was the first to cry and rush into Luigi's arms. "Mama!" He cried. "We saved you! Did ya see?" He said tears streaming down his face. "Sì figlio mio. You and your siblings were so strong and brave. Come the rest of you Bambini!" Luigi said holding out an arm for the other. Larry, Wendy, Lemmy and Morton all charged in and knocked Luigi back a bit, all laughing and crying. Bowser helped him up and hugged them all, still sitting. Ludwig had walked into the hug, keeping it together best he can. Roy joined in too, secretly wiping tears while dragging Iggy with him, who didn't even fight. 
It was all over. Everything was saved and as it should be. Everyone gathered to watch the sun set on the horizon, knowing everything will be normal. They had begun to leave, after gathering the troops and the captured ghost. While carrying Luigi in his arms, his kids on his shell, with Peach, Mario and Daisy waking beside him, he let out the three words he wanted to say to his queen.
"Marry me, Luigi."
It caught everyone around them off guard.
"Yes" was the final thing Luigi said before he fell asleep in his fiancé's arms, his healing process beginning, along with their new life journey.