*just a heads up: New girls will appear in this chapter. It's your choice whether they can be in the harem of not*

[No One's POV]
All of the male doctors finished killing off the Genm zombie army with their Critical Strikes. A few people should be revived with their defeat. They closed their drivers and took off their Gashats, reverting them back to normal..

Kiraya: Glad that's over.

Snipe: You and me both..

Emu: Hey, wait. Where's y/n and Poppy?

Hiiro: Hmm? *looks around for the two* There not here.

Taiga: That bowser bugster must've set them and himself to another world.

Emu: Are you sure?

Kiraya: Let's head back to the CR. Maybe we can get some answers there.

Emu: Ok.

The 4 rider's started walking back to their base to discuss how how to bring back Y/ th and Poppy.

Emu: *thinks* I hope your ok, you guys

[With Y/n and the Plumbers]
We can see y/n in bowser's castle in world 8 with the Mario Brothers, who also wish to face off bowser to save their captured ones..

Luigi: So y/n..

Y/n: Yeah?

Luigi: Are you sure that you can't defeat bowser with that..uhh..

Y/n: You mean the Gashat? Trust me, this holds much more surprises than ever..

Luigi: If you say so..

Next thing, multiple squadrons of multicolored Koopas, 2 giant Goomba's(two with wings), three colored koopalings, 15 smaller Goomba's and 6 Army Koopa troops

Y/n: Wow..so many.

Mario: I-a faced much more.

Luigi: S-so scary.

Army Koopa: Hah,ha! You three will never get past us. Especially you, human.

Y/n: That's what you guys think. *takes out his game driver*

Mario: *look questionably about what he took out* Say-a Y/n. What is that thing you strapped on yourself?

Y/n: Trust me, Mario. You'll definitely like this *looks at  gashat* Let's see what game i get today. *presses gashat*

It's a me..Mario!

A pop game title screen of Mario soaring into the skies with a star like creature..*Super Mario Galaxy 2*

Everybody stood shocked at y/n's actions.. Especially mario..

Luigi: M-mario..what's that you?

Mario: *still speechless, but nods*

Y/n: Mushroom Gear 10...Henshin! *loads in Gashat and opens pink lever*

[Gasshatto!]
[Gacchan! Level up!]
[The Princess has been Captured again! Only one Plumer can save the day! Super Mario Bros!]

A holographic projection showed a game rider that looks like ex-aid, but has a mario design. When it collided with y/n, it was in his rider form that looked similar to ex-aid, but had a few differences: Now he's wearing a semi red and blue body suit with red shoulder pads that had the Mario logo the silver chest plate, on the center resembling a game controller with four colors on it. Green ring trimmings on his ankles, wrists upper arms and thighs. His helmet resembles the same very mascot character in the screen but the eyes are blue, dons a gray mustache and Mario's Cap..

*I wish I knew who drew this*

Mario/Luigi: *with stars in there eyes* Whoa!!

Koopa: Are you kidding me?! Another Mario?!?

Y/n:That's-a right. Now then..*Pulls out a Hammer* Let's rumble.

[3rd person POV]
All of the minions charged directly at The Mario bros..and the new Kamen Rider Shroom(new name) for the first attack. Y/n whacked the first goomba with his weapon, then a flying blue koopa flew directly at him to blow him up.
Y/n backhanded the blue shell with his left hand and it flew to two giant goomba's, causing them ryo fly inn the lava. Mario stepped into a Koopa and took out a fire flower and ate it, transforming him into fire mario..

Mario: *fires large amounts of fireballs at Koopalings and 2 hammer bros.* Yyaaghhh!!

Hammer Bro 1: *feels tail on fire* Hot! Hot!

Hammer Bro 2: *runs from his partner* Ahh! Don't touch me bro.

Luigi..despite being scared decided to jump into action and used his hammer on a few regular koopalings. One hid inside his shell and Luigi used that advantage to grab it and chucked it to nearby goombas, making fly all over the place.

Luigi: Oh, yeah.

Y/n shot a massive wave of ice*power of the Ice Flower* freezing the entire Goomba army. Next, his left leg produced colorful electricity, as he did a flying karate kick to the rest of the goomba's..

Y/n: Take this! *collides with the frozen Goomba's, causing an explosion* Well, that was awesome.
*Closes game driver and removed Gashat*

Click to save!

Y/n was back to his normal self, making the plumbers stood there I  awe..

Luigi: How did you do that?

Y/n: I'm from another world.

Mario: Another world?

Y/n: Yep. I live in a World where specialized doctors like a certain friend of mine is capable of handling a certain disease that plagues my home..

Luigi: Wow..

Mario: You can say that again.

Y/n: Let's go save the girls.

Luigi: Okie-dokie!

The trio proceeded to traverse. But unknown to them, two women were starting at the entire scene.. especially y/n

???: Wow.. that y/n guy is strong.

???: Y-yeah.

???: Could you not be scared for just one moment?!

???: S-shut up! I-it's not my fault i'm made like this.

[With Poppy and Peach]
Peach: So, Poppy. I've been meaning to ask..

Poppy: Huh?

Peach: What made you fall in love with y/n?

Poppy: *blushes* Umm..well, it was the time when a tournament started live. But i was brainwashed by the other bugster's..

Peach: Oh, no.

Poppy: Yeah.

The doors busted open, to reveal bowser..

Bowser: You two are coming with me. *grabs both cages*

Girls: Ah!

Bowser withholds a pink crown item in his right hand and admires it..

Bowser: They won't be able to beat me with this on me..*drags the cages down and pulls them with him*

Poppy: Ow. *thinks* Please save us, y/n..

[Back to the heroes]
Y/n and the Bros. finished off the remaining enemies and started heading to the main big doors..

Y/n: This is it. Bowsers domain.

Mario: Yep. You feel ready?

Luigi: I'm prepared.

Y/n: So am i. *walks to door* Let's a go!

Y/n opens the door to see bowser with poppy and princess peach..

Bowser: Heh. You boys got here.

Peach: Mario! Luigi!

Poppy: Y/n!

Y/n: Release them, reptile.

Bowser: Ha! Not on your life.

Mario: Then me and y/n will take you down.

Y/n: Luigi, try and see if you can get the women out of their cages. After that, join us while you can.

Luigi: Ok.

Mario: Wait..*sees a crown-like item in bowsers hand* What do you have there?

Bowser: Oh this? This item will make me invincible. *places crown on head*

Bowser's body began shifting dramatically, until he glowed bright red. It blinded everyone for a short while before it came to a stop. When everyone looked, the guys*y/n mario and Luigi* eyes bulged at what bowser had become. He..well now she now transformed into a female character resembling Peach but with a black dress, fangs, thick eyebrows, large horns protruding from the sides of the head, and Bowser's spiked attire and shell.

Y/n: what..the..hell?

Peach: A woman??

Poppy: What the..

Luigi: *thoughts* S-s-so thicc..

Mario: Umm..Bowser???

???: Nah, uh. You may call me.. Bowsette. Let's rumble~

Y/n: Oh..boy. Time to power up *presses Gashat*

It's a me, Mario!

Poppy: A new gashat??

Y/n: Gear 10..Henshin! *loads in Gashat and opens pink lever*

GASHATTO! GACHAAN..LEVEL UP!

Y/n was reverted back into his mario form, shocking the three women.

Poppy: Y/n..he has a new form..

Peach: He looks just like Mario!

Bowsette: *stands there in shock* W-who do you think you are!?

Y/n: Kamen Rider Shroom. And your fate is mine to decide.

Bowsette:  Not today it won't. Kamek!

A female with a wizard's robe and crown came flying on a broom next to the Koopa queen

Bowsette: Make yourself useful and work your magic.

Kamek: Yes, Ma'am.

The gal on the magical broomstick  flew in various directions, spewing out magic from her staff..

Kamek: All yours, Ma'am. If you're lucky, you could defeat them..*takes a glance at y/n* That guy is hot as hell.

In a blink of flash, the room they were in shifted into a chamber like cavern with multiple wall statue of bowser and minions..

Y/n: Where are we?

Mario: Princess?? Luigi??

Y/n: Poppy.. where are you?

Suddenly the ground began to shake violently. Mario almost fell over at the sudden movement.

Mario: *thought* What the-? What the heck is going on?! 

Then the Mario duo saw what the rumbling was.

Bowsette came up from the pit, knocking Kamek aside into the pit. But she was not ordinary. She was huge; Mario was only about as tall as his eye. Y/n now understood why Kamek had said: "if you're lucky". There were no means of escape in this room, and the Koopa Queen could easily crush the two heroes like a bunch of bugs. Mario gaped at the oversized Bowser. Bowsette roared, causing Mario and y/n to cover their ears so their eardrums wouldn't burst.
Bowsette: Well, you two, looks like you've met your match!"

She laughed at Mario's scared expression. But looked at y/n, as he shows no fear..

Bowsette: *thinks* It's almost a shame that i have to burn a handsome face like his *to reality* Okay, enough chat. It's fire time!"

She blasted a huge fireball at Mario and Y/n. They jumped to avoid it, and the fireball hit the wall behind them, making it crumble.

"Grrr, I missed! Well, if I can't burn you, I'll just crush you!" Bowsette roared, swinging one of his huge arms at Mario. Mario backed up to avoid being swiped and spotted a moving platform (also called a lift). On a different platform made of stone, he spotted a question block.

I wonder if there's anything in there that might be useful, Mario wondered. He hopped onto the platform, avoiding another one of Bowser's fireballs, revealing a bunch of coins. Probably to tempt Mario into going down so it would be easier for Bowser to hit his target. Mario hopped onto the platform and ran towards the question block. As he ran, he noticed the rune-like markings on the floor, walls, and ceiling. They were all made out of the same dusty-gold stone. Finally, Mario reached the question block, hit it, and out came two Fire Flowers.

"This probably won't work, but let's try it!" Mario said to y/n. At this point, he would try anything. Y/n was literally running for his life, so anything he could do to prevent Bowsette from reaching them was a huge help. Both guys grabbed the Fire Flowers and transformed into their form and started throwing fireballs at Bowsette. But, of course, the fireballs did nothing to him. She just laughed.

"You think you two can stop me with those puny sparks? Ha!" She growled, smirking. Mario gulped.

"Okay, so I just have to keep running, I guess" y/n thought, starting to panic a little. Bowsette swiped at them another time, and they avoided it, running through the gap Bowsette's giant fist made in the wall. Mario and y/n ran down to another lift, waiting for Bowsette to make her way over. Bowsette leaped over, smashing all the runic stones that were in his way. Y/n grabbed Mario and jumped out the way before they are flattened..

"Whoa.." thought Mario. If he was in the way when Bowser leaped again, he was screwed.
"Thanks for that"

"No problem" The Rider said

Bowsette breathed another fireball at him. He jumped, causing the wall behind him to crumble, revealing another question block. Another Fire Flower was inside of it.

"This is getting kind of easy" Mario thought.

Bowsette swiped again, but this time Mario and y/n was too slow. He got scratched a little on his left arm, while y/n lost some health from my chest.  They both cringed as Bowsette grinned. Mario and y/n ran through the hole onto another lift.

I think we jinxed myself, he thought examining his arm as he stood on the lift, waiting for it to get to the other side, where one of Bowser's fireballs broke through the wall.

A Goomba was inside, but as he was running for Mario, he tripped on a piece of rubble and fell into the seemingly bottomless pit. The heroes jumped onto the platform the Goomba was on before and hit yet another question block, this time getting two 1-ups Mario's scratch vanished, while y/n's health was restored as the familiar tune rang out in his head. They avoided another one of Bowsette's fireballs, breaking the wall that stood ahead of him. The wall revealed much less stone; nothing to jump on except a stationary lift. A pillar of the runic stone stood a little below the lift, a question block hovering above it.

"Wonder what's in there.." y/n thought to himself.

They jumped onto the stationary lift and the lift began to move. Bowsette suddenly looked very angry (as if she wasn't already) and let out an earsplitting roar. Lava rose from the pit as the plumbing twins jumped onto the stone pillar and Bowsette leaped over to get a better shot at them, sending a wave of lava forward as she landed. Y/n jumped and hit the question block and out popped a pair of propeller mushrooms

"That's helpful.." y/n thought as he grabbed it. He threw the other to Mario who caught they could now fly across the lava with the propeller suits. *Your overalls change to light abd dark orange and the propeller cap is installed into your helm.*

But the lava pit seemed to stretch for miles. Lifts were scattered over it, with stone pillars sticking down from the ceiling here and there. But at the end, Mario swore he could see something pulsing slightly with light.

"Incoming!!" Him and y/n spun into the air as Bowsette crushed the pillar they was standing on moments before. Both landed on a lift but jumped off as soon as he was on it. Mario wanted to get to the end of this runic maze before Bowsette could finally do what he wanted with him. Bowser came charging after him, jumping every so often to create another wave of lava. He began to breathe fireballs again, smashing the stone pillar-like stalactites into rubble.

As Mario and y/n got farther in the maze, Mario could see the pulsing light get brighter. When he got close enough he recognized it was a big button with an ! on it, just like the one he had used to send Bowsett down the pit before.

 "That must be where Peach, Poppy and Luigi are! y/n thought, landing on another lift as Bowser swung and barely missed.

There was one last runic stalactite in his way, a lift running just under it with very little space between it and the stone. Without thinking, the heroes jumped onto the lift as Bowsette nearly ripped him to shreds and ducked so he wouldn't be pushed into the lava. When he could look up again, he gasped. Peach was in a cage above the huge ! button, with Luigi and Poppy in a cage just beside hers.

Mario! Y/n" they cried in unison. Mario jumped off the lift just in time onto another one much closer to the large grey stone platform that held the ! button. The Villainess's eyes widened in anger and fear. But something about it looked fake.

"Don't you dare press that button!" She snarled, lunging for Y/n and Mario. They jumped, but not early enough to avoid her swipe, causing them to lose their propeller suit, but luckily the swipe didn't leave much of anything.

"Too late!" Mario shouted and jumped to press the button. A loud ringing sound rang out in the hall. The castle began to rumble. Bowsette paused.

"Huh? What's going on? This was supposed to be a trap!" She roared. Suddenly the ground under her crumbled. She looked down and then at the heroes..

"Allow me to finish this" y/n said, taking out his Gashat and blowing on the tip, before inserting it in the Kimewaza slot

GASHATTO!
KIMEWAZA!

Y/n's gamer body pulses with red energy before he pressed the button again..

FIERY CRITICAL STRIKE!

Y/n in the air and drop-kicked Bowsette in the gut, forcing her to the ground. After jumping off her, y/n launched a great fiery spiral blast. The blast spreads outward down as it travels, hitting Bowsette point center..

"Ah!" She growled. Then the whole floor collapsed, taking the runic stones and Bowsette falling in the darkness  with it. The only thing that was left was the grey stone pillar Mario and y/n was standing on. A chimney tune started as a pop up screen with fireworks exploding showed off behind him..

GAME CLEAR!

"Whew," Mario said, wiping his brow. "That was close."

"You can say that again" y/n said, closing his driver and removing Gashat..

Click to Save!

The doors to the cages that held Poppy, Peach and Luigi swung open and they hopped out. Poppy jumped out and bascially glomped on y/n..

Poppy: Thank you, thank you!

Y/n: Hehe, no problem.

Peach: Thank you for saving us all, Mario. Same to you, Y/n.

Luigi: Thanks for the help, y/n

Y/n: It's my pleasure.

Mario: No problem, I'd do anything for my friends. So... *looks around the huge empty room* how are we getting out of here?

Y/n: Leave that to me. *takes out Bugvisor and presses B button*

STAGE SELECT!

[Y/n's POV]
I teleported every one of us to the starting point of World 8, whereas a few things were waiting for us: Poppy's Bugvisor and Gashat, An Airship for Mario, Luigi and Peach to ride and a resigned Nintendo DS  lite..

*artwork from Laserbeams on deviantart*

Y/n: *grabs the makeshift console* What's this doing here?

Poppy: *transforms back into Asuna* A Nintendo DS? But it looks different.

Y/n: It was one of my creations for my love of the classic games. So, i thought i resign it to my own liking. Plus, I also made it into a new form of teleportation to video games of my choosing, summoning characters and items of my choice.

Asuna: Amazing! But will it get us home?

Y/n: Let's see..

I turned the system on, and a spectral hud appeared in front of me. Multiple game worlds are shown, but i picked the CR in the woods and conjured a portal in front of us..

Mario: So.. I guess this is goodbye.

Peach: Aww...

Luigi: Well, that's a shame.

Y/n: It's not really goodbye. It's just see you later.

Peach: Well, I truly appreciated you help us out.

Y/n: If you ever need help again, I'll be there.

Luigi: How can we expect it?

Y/n: When the time comes. *turns to Asuna* Ready to head back?

Asuna: *hugs my back* You bet.

Me and her walked through the warphole, as the Super Mario Characters waved and said goodbye. As we entered, the portal closes, bidding the Game farewell..for now. Secretly, I texted emu that we are on our way.

[Emu's POV]
Me and the group were trying to find out where poppy and y/n ended up. Next thing, I felt my phone buzz and I picked it up to see a message from y/n, saying that he's on his way..

Kiraya: Those two are something.

Hiiro: What type of Gashat did that bugster had..

All of a sudden, a portal came spewing from the DoReMiFa Beat station. Next thing, two people came out and revealed to be Poppy and y/n..

Emu: Poppy, you're ok.

Poppy: Mmhmm..thanks to y/n.

Emu: But where?

Everyone saw the wormhole pulsing with energy, before i saw y/n coming out. One problem..half of his left arm looks sliced off with orange particles flowing..

Y/n: Shit.. talk about bad teleportation.

Poppy: *gasps in horror* Y-y/n..

Emu: Y-you're arm!

Y/n: *Blankly looks at his severed arm* Not the first time this happen.

Poppy: First..time?

Y/n's dismembered left started glowing before his arm somehow grew back, and he brushed it off like it was nothing. Dr. Kagami walked to y/n and inspected him, before smiling?

Dr. Kagami: Hello. You must be y/n. *offers handshake*

Y/n:*nods* That's right. Nice to meet you. About about that question Hiiro.

Hiiro: *looks at y/n*

Y/n: You want to know about how i can transform and why i haven't been killed recently? I might as well tell you..

Poppy: Is it because of the virus in you?

Y/n: It's more than that. The reason that I can transform into a Kamen Rider is that..

Me and everyone else leaned in close to find his answer. Parad exited to hear this as well..

Y/n: *sighs* I am dubbed as Patient Odin, The All Class Host of every Bugster Virus i carry within my body..

The crew jumped back in surprise of y/n's revelation of his true self..

Emu: P-patient Odin??

Hiiro: Every bugsster virus is residing inside of him..it's can't be possible.

Parad: Having many viruses like can only mean-

Y/n: Yes. I'm a Bugster for the past 3 years!

Everyone: EEEEHHH!?!

Y/n: *thinks* Sorry, Mom and Dad..but they should know the truth.