Paul Gekko and his friends gave chase only to be stopped by the Galactic Eggman Army. Luckily, the mysterious samurai comes to save the day. “Go! I’ll buy you time!” The mysterious samurai said with a voice of a woman. “Okay.” Paul Gekko said as he was running to pursue the ship. As Paul Gekko’s group meets up with Mario, Luigi and Yoshi, they stumbled upon gloomy-looking house.

The Atlantic Pirate Siblings decide to inspect the house, unaware that they are being watched by Dr. Award and the Egg Enforcers with a camera mounted to the house. They saw that nobody is inside. SoHe tries to go in, believing that this is someone’s vacation retreat. “Wait Adam! There is something familiar about this place.” Paul Gekko said. “DRAT! Paul Gekko knew it’s a trap!” Dr. Award said angrily. “Mark my words! They’re tired, hungry and, best of all, lost. This cozy little mansion is just too tempting for the snoozing group of rebels like the Atlantic Pirates. And it’s unlocked, which makes it irresistible.” said Bowser. Mario states that he believes it is a trap.

“WAIT BOWSER! The Galactic Eggman Empire has played out the secret weapon!” said Dr. Award’s subordinate, pushing the red button. As Hansel, Adam and Gretel leave with Mario, they start to smell provolone. “ADAM! THERE’S FOOD IN THE HOUSE!” He shouted. “Paul Gekko! GET BACK HERE!!!” Adam and Mario yelled.  “Now that we Muffled the meddlesome rebels and the Marios…. The Eggman Empire can get back to planning my perfect wedding”. Bowser said happily.

“Paul Gekko! Luigi! Where Are You?!” Adam and Hansel said as their voices echoed through the hallway. Suddenly, a Boo appears behind them. They noticed this and she saw another one as well.  Gretel said, “OH NO! IT’S A HAUNTED MANSION! Lets get out of here!”  They ran away as the Boos began chasing them.

Meanwhile, at the hidden room, Luigi and the prince followed the scent to a room with a huge piece of provolone cheese.

“Well that explains the fan that was keep the cheese delicious.” Paul Gekko exclaimed. “Are you kidding! It’s too good to pass out!” said Luigi, jumping on the huge piece of provolone cheese. “Hey save some for me!” And with that, Paul Gekko jumped into the cheese as well. The two ate and ate and ate. But a large swarm of Boos started to gather behind him. “Luigi can you get me the ketchup. I think it’s in the kitchen.”He said. Luigi turns around, panics and runs away. The Boos corner the group against the wall. Paul Gekko and co. slide along the wall, keeping their eyes on the Boos. They slide until they reach a hallway and and the two ghostly beings approached them from the rear.

At Bowser’s Palace, Dr. Award watched as a massive group of Yoshis pulling the cart with the giant wedding cake on it. “We have the best hypnotist in the country putting them in deep trances.” The Magikoopa said. “Thank you Magikoopa. Keep your eyes peeled for intruders or any rebel activity even within the Yoshis.” Dr. Award said. “I’ll keep my eyes peeled.” The Magikoopa replied. “Bowser. The blushing gowns for you wedding are fitting as we speak.” said the Egg Soldier. ” I’m going to sneak a peek at that dress.” Bowser said. He dashed happily to get a look the dress. “BOWSER WAIT! It’s bad luck!” Dr. Award warned. “Hmhmhmhm… I sent Aries to the mansion to test this mysterious character who may have the chance to stop the wedding.” Barrel giggled.

At the haunted house, hours later, they meet Aries and begins to feel tired from staring down the ghosts. She takes Paul Gekko and the gang to a nearby room. They close the door. Paul Gekko sees Aries kindness within her heart and spoke; “Oh Holy Spirit of the unknown time, why did you save us?”

She told Paul Gekko, “Long ago, Karen Lilica was a Celestial Mage. Leo saved me from being abused. When we’re separated, I’m doomed.” The Celestial creature broke down in tears and cries.

He replied. “You have survived the Fiore Civil War which had destroyed your country. Now you must help.”

The Big Boo and his friends were very angry. When they got inside, Big Boo finds them with a doctor and a nurse who was kind to the Boos.

They direct the the giant ghost to lie on the couch, and Mario diagnoses him with anthrophobia, asking to be told about his childhood.

They’re all crying as the they has explained its troubled past.

Mario comforts the them and tells him not to let his bullies control his life.

They tell the Big Boo how big the multiverse is, and those bullies did not matter. They head outside to get some air. As a thanks for helping them, Mario and Paul Gekko asks how to get to Bowser’s castle.

After the Boos returned home, Paul Gekko’s group proceeds to head for Bowser’s Castle.