Gwen and Mallow's Birthday-Existyday Bash

It is September 9, the 16th birthday of Mallow and the first Existy-Day aniversarry of Gwen. At 6 am, Sina's clock started playing a ringtune, prompting her to wake up. She then wakes up and looks at the time. It is 4:20 AM, where Sina took a bath for 31 minutes. She then saw Xizxaz and Glerkle, who woke up 10 minutes prior to Sina leaving the bathroom and wearing a towel. She then dries herself and wears some clothes. "Hey, it's Mallow's Stinky 16. Bring your gifts and your best tricks, like the doomsday bomb you made!" Xizxaz told Sina with these words, while Glerkle asked "Sina, it's Gwen's first Existy Day! You don't want her to be very mad or sad like the time you forgot the existy dates of Eden and Tomayhem, so remember to celebrate her Existy date!".

Sina, prepared for both Mallow's Stinky 16 and Gwen's first Existy Date, had brought some special things and heard a knock on her door, only for Sina to see Mallow (who controlled his toxicity to be more tolerable) and Gwen together when she opened the door.
"It's my birthday!"
"It's the day my design was made in the real-world universe!"
(Gwen got this from her sister Eden.)
Mallow and Gwen talked about the former's birthday and the latter's Existy Day in front of Sina. Sina then replied to them with "of course, i'll celebrate your birthday and Existy day, with a special game..."
Gwen and Mallow, thinking about the game, thought of stuff they wanted in it, such as a stink time-bomb, a vault of spirits that has been opened and must have it's spirits put back inside by them, junkyard battle royale, magic duel, demon exorcism and stink-related comeptitions and more that they like...
Xizxaz and Glerkle worked out for Sina's obstacle course-puzzle surprise, where the grand prizes would be Gwen's most favorite and Mallow's most favorite. They worked on a toxic barrel maze, a labyrinth of darkness and spirits, a tunnel of tires, a spike tundra, a stink time-bomb that needs to be defused, a spirit vault that needs it's spirits to be put back in order to progress, a mini-demon exorcism challenge, a sewer course and others, plus a two-part finale...

Glerkle and Xizxaz had some ideas for the game that were changed. Originally, the spike tundra was planned to be more lethal, with the spikes being able to injure Garbodors like Mallow, but was changed to be less sharp and deadly as the spikes could only penetrate and stab Cheeseslimes like Gwen, who can regenerate like slimes and Fakoids (Fake Peppinos). Glerkle had an idea where the 5-level multiple choice quiz was harder, and if one fails, they will suffer a fate involving Fakoids. If Mallow failed, Gwen would been humiliated by small Fakoids cuddling and licking her, while if Gwen failed, Mallow would have been mauled then eaten alive by feral Fakoids. Xizxaz felt that Mallow being killed was unfair and disrespectful as they weren't intending to kill him since it was his birthday, so Glerkle and Xizxaz settled for two seperate podiums for Gwen and Mallow, with a door requiring both of them completing to progress. By the third level, if both are in the same level or managed to get to the level in the same time, the questions on the two podiums will swap. The punisment for choosing wrong answers was toned down to Fakoids annoying the one who chose the wrong answer by making silly faces, taunting in slightly rude manners and raspberries. Xizxaz also had an idea of a Leftover Meal Rumble but Glerkle told her that Gwen hates mold, since it is a weakness to most kinds of Cheeseslimes, so they reworked it to a sewer course, with fake, Cheeseslime-friendly "sewage", Robo-Mr. Pinches, tubes to slide and warp through, non-lethal robo-aligators, pipes that need to be unclogged in order to progress and pipes that shoot out "sewage", some of which are underneath a leaky sewer pipe.

There was one last obstacle for completing the obstacle course idea. Xizxaz wanted an stink-bomb defusion as the second part of the final stage. Glerkle and Xizxaz althogether thought that would only interest Mallow, so they put in a game that resembled a magic duel (since Gwen loves magic battles) and had graphics and mechanics resembling that of Gen 1-2 Pokémon games, which must have the two win against two Pizzards that Gwen hates. If both Pizzards are defeated, the bomb is defused, but if the Pizzards defeat both Gwen and Mallow's avatar or if they waste enough time, the bomb explodes, spreading noxious, stinky goo that is also safe for cheeseslimes.

At 2 PM, the project is done and Gwen and Mallow went back to Sina's lab-mansion base to see the game. Glerkle and Xizxaz open the door for both of them, only for them to see a portal. Once they entered, Gwen and Mallow, surprised that Glerkle and Xizxaz had brought them into an obstacle course-puzzle game for their birthday and anniversary, looked at the place in awe as they hear Sina talk from the floating screen.
"Here's the obstacle course-puzzle game that you were awiting for...

Which is something special...

That both of you will REALLY LIKE and enjoy!"

Gwen was annoyed with how Sina said "REALLY LIKE", reminding her of The Noise. Despite that, Gwen feels kind of happy, expecting the game to look good and will be the best she and Mallow have this year. The stage turned on it's spotlights (with each room having a modified version of one to fit it's theme if it has one) and what they saw was a slimy gothic room, reminiscent of a dungeon, masion or castle. The furniture has strings of dark purple goo, with some decorations, such as a candle holder with three black candles, a skull with a dark violet candle and some spellbooks, covered in goo.
"In this room, you two wil have to find 5 items in order to go to the next room. If you run out of time, you will be covered in smelly ectoplasm, but i can open the door for you if you still want to play. Find all of the items and place them on the respective pedestals before the 5-minute timer runs out to zero."

"It sure looks scary..."
"I really like how dark, cool and gothy it is."

Gwen and Mallow looked for any items that could make the pedestals glow and when complete, open the door. When she pulled a lever, Gwen found herself in a small room containing one of the items, a prop staff, a bed, a poster of a goth band and a prop necrominon. She then snatches the voodoo, which is one of the five items. Meanwhile, Mallow apparantly found the easiest, being a bottle with dark green liquid and eyeballs. Mallow puts it in the pedestal, causing it to glow, while Gwen pulls the book-lever again, returing her to the large room with 3 more items to find. She puts the straight-horned voodoo into it's pedestal, glowing as well. In the couch, Mallow then stumbled upon a key, hidden within the pillows. It had a stylized cartoony skull at the top. He then noticed a keyhole in the wall and puts the key in it, carefully turning the key and opening the small but spacious secret safe in the wall, only for small Pepperoni Goblin bats and Woobat to fly into his face, but most of them were dodged as only 5 of the 10 bats flew into his face. He saw and got a magic ball, with a skeletal hand holding it as part of the display and rushed to the corresponding pedestal, making it glow. Gwen tried finding the 4th object, on the bookshelves, under the table, chairs, couch, etc. until she found another lever, which was well-hidden in a closet. She pulled it, causing the basement trapdoor to open and then she climbed down without injury. What she saw was a bunch of writhing purple rubber tentacles, covered in purple goo. She managed to dodge the tentacles and was never covered in it's slime. The slab with a spell written on it was grabbed by Gwen, who went back up and  put it on it's pedestal. For the last item, it had to be the hardest. They kept searching, but Gwen noticed a thing at the chandelier-like spotlight in the room. She uses her magic staff to grab the item from high above with magic and inspects it with her eyes, only for her to know that it is a limited-edition hat, themed around her favorite goth rock band, Edamned Souls. It does resemble that of her favorite band member, Hannah Grimmort. She then decided to put it in the last podium, ultimately opening the door but also dispensing another of the same limited-editon hat she can keep home.

Gwen and Mallow inside the next room, that being a junkyard obstacle course.
"Welcome to the Toxic Wasteyard Obby! This will be messy, so hold onto your skin!

First we have the Toxic Waste Barrel Maze, with small, haunted plushes roaming around. They will slow you down by mildly scaring or annoying you, so avoid 'em in the maze!"

"Oh yeah! It's gonna be great, besides these dolls..."
"Eck! It smells like Trash Pan vomit!"

Gwen and Mallow manage to go through the maze, with them being rarely scared (for Gwen, annoyed) by the haunted dolls.
"Garrgh!"
"Hmp..."
"Whuh..."
"Hurghh..."
They had escaped it unscathed, but they have one more to face...

"The second and last challenge in this room is a tire tunnel, with some dodgeballs to avoid! Don't get hit by the dodgeballs!"

"But i don't to crawl on the ground! It's dirty!"

"Don't worry, the ground isn't actually filthy, since it's fake."

Gwen and Mallow crawled to the ground, avoiding as many dodgeballs as they can. Fortunately, they weren't hit by many of the balls. They escaped unscathed.

"We did it!"
"That's great to hear."

The door opens to the next room, which is a room containing a conainer resembling a lantern, settled in a table. Gwen and Mallow saw two vacuums with a ghost sticker on it, making them question what would they use them for.
"Why was i given a vacuum cleaner? Unless it involves spirits or particles, it won't make sense!"
"I kind of agree. This does not have ghosts in i-"
"Wait... that container's glowing and there's a note from Sina..."
While Mallow was confused about the vacuum, Gwen noticed something. She went closer to the table, noticed the note and read it.
"This container has 30 spirits. You are given vacuum cleaners to suck up the spirits and put them back in the container that they belong to. If you manage to fit them back into the container, the door will open and as you finished reading this, the container of spirits will open."
She finished reading the note and the container opens, releasing 30 small spirits, bounicing around and making mischeif.
"Time to put 'em back in the container!"
"Now these vacuums have a use!"
They sucked as much ghosts as they can, with them passing through them as they bounce from the walls and floor, running away from being sucked, but to no avail, most were sucked. Gwen has 15 spirits in her vacuum while Mallow has 14 in his, so they teamed up to suck the last spirit, who was red, fast and mischevious. They used their vacuums at high strenght, which the red spirit has no match for. Mallow now has 15 spirits like Gwen does, due to his vacuum having captured the ghost first. They safely put the spirits in their container by switching onto the reverse switch and closed the container. The door opened for the 4th room, which stank of sewage and garbage.
"Eee-yuckh, this smells very repulsive..."
"That good 'ol smell of sewage and trash... aah..."
"That reminds me of that place from the Slums..."
They were now in what looks like a certain sewer system from the Slum whose name would not be mentioned due to it containing a profane word. "Wait, what?!" yelled Glerkle.
The stench of the sewage was repulsive for Gwen, but for Mallow, it was very nice. As Gwen was standing in what looks like trash blocks (but are actually syntethic and clean), brown clothing came out of a pipe. She looked at disgust as she thought she standed on genuine unhygenic garbage.

"For the fourth room, this is a sewer obby, which has actually clean fake sewage and fake garbage that smells like the real thing. You have to go through Trash Pans, mechanical Mr. Pinches and other things, like the Muks who regulated their toxicity levels to be safe and pipes to go through."
Gwen and Mallow knew what they had to do: go through the repulsive-smelling sewer room.
Gwen ran and jumped onto a Trash Pan, making her move into another platform while Mallow waves at the Muks, who are friendly to him. She then swims in the sewage, dodging the robo aligators, to go to the next platform, unclogs and warps through a pipe and gets into the next part of the room, as for Mallow, he also goes through by unclogging and then warping in a pipe, runs and gets pinched by a mechanical Mr. Pinch, swinging him into the platform Gwen was in. Gwen went to Mallow and they went into a Trash Pan and bounced into the last platform, which was settled under a leaky pipe. Mallow and Gwen dodged the mechanical Spit Cheese's slimy cheese balls and the sewer pipes shooting out gysers of non-toxic sewage, while they also got covered in non-toxic sewage.
"Yuck."
"Garhahaha! This is fun!"
They swung by using the mechanical Mr. Pinches and went to the last pipe to unclog and warp, making it into the end of the obby.
"We did it..."

They took on 10 more rooms, with them going in the ethereal spike tundra-dune.
"*gasp* Gwen, are you okay?"
"I am okay."
She then slimes herself back to normal and wears her clothes as usual.

Then the labyrinth of spirits and darkness.
"Gaarh! This is scary!"
"This feels fun for me, but i'll always hold your hand when you're afraid, whenever clean or filthy."
Then to the next room being a green gooey maze.
"Eckh! I got stuck and this goo feels gross! Yuck!"
"Don't worry, i'll pull you out!"
"Hnghh...!" plop

And the next one, being a mini-demon exorcism challenge.
"Hurry! We got 3 minutes!"
"By the power stowed upon the stars above, i banish ye back into the underworld!"
"Rehee'yugh! Gahahahhh!!!"
The small demon got exorcised back into the underworld, where it came from.

Then skipping 4 other rooms like the rubbish picture recreation and goth music recreation rooms which will be mentioned in "Gwen's 2nd Existy Day" because Sina had no time for completing the story normaly and had to hurry up cuz this part was written at September 8, when there's some hours left 'till September 9 and-

"Glerkle! Sina!" Xizxaz shouted at Glerkle and Sina, as the second broke the 4th wall and the latter for the second time in the story. "Hey!" Yelled Xizxaz.
Back to the 14th room they have to face, Gwen and Mallow were answering questions via tapping the answers.
"Rings of mushrooms... that means faries."
"Feeds on rotten food? It means flies, Garbodors and Muks!"
*boop* ding ding ding!

They chose the correct answer and then both manged to get through the 2nd level, having their questions swapped.
"Witches- sulfur looks great on... The Noise?"
"Sulf- witches get their black magic powers stronger than they were in a normal night with... Saturn?"
*BEEP!*
Both got wrong answers due to them being confused with the question switch, which means a Fake Peppino showed up outside for one of the chambers, one holding a sign saying "noise likes sulfer, lol" and the other holding a doodle of witches getting powerful when they see Saturn.
"Nyaha, nyaha nyaha!"
"Heeglubaglubablugluba!"
"It must be Rock-Poison types, right?" *boop* ding ding ding!
"Must be during a blood moon, just like what you know." *boop* ding ding ding!

They were now in the 4th level, with the answers getting harder.
"Toxic waste has... uranium?" *boop* ding, ding, ding!
"Pizzafaces are to... Transformers?" *boop* BLEEP!!!

A Fake Peppino holding a sign saying "PizzA fAcE is mEgaTroN!!!" with a doodle of Pizzaface being Megatron on it shows up on Mallow's side via a pipe.
"Eeehyglubahublablrblah!"
"Yeesh! Pizzafaces are to mechas!" *boop* ding ding ding!

They are now in the last level of the QnA, being the hardest for them, due to the questions on their touch screen device being switched.
"Sewage sludge is... goulash?" *boop* BLEEP!
"Aughababloophaha! I eets ghoulash in sewarr..."
"Belzebulb looks like... a fox girl?" *boop* BLEEP!
"Haw, haw, hee, haw! Looks like blubezleB is fox to him... hee hee."
They wispered the correct answers that they know to each other in order to avoid multiple failed attempts.
"Sewage sludge is bacteria and sewage." *boop* ding ding ding!
"Beelzebulb is a giant demonic fly with a crown!" *boop* ding, ding ding!

They managed to finish all the quetsions, with the chambers and door to the last room opened.
"The big surprise awaits.."
The room looked like a sewer, but was something else, as it resembled the ones from that one modern Cartoon Network animation series. They were given toy guns which looked like they were made of junk.
"This is the first part of the finale. Your goal for this part is to shoot the fake trash and sludge monsters and work together to defeat the big one before you go to the second part."
A bunch of cardboard cutouts of sludge and trash monsters show up. They shoot up the cardboard sludge and trash monsters, with Gwen shooting like The Vigilante.
"Hya! Hah! Haha!"
"Garharhar!"
After knocking down all the cardboard monsters, they have to face a big cardboard monster, teaming up together to knock it down.
"One!"
"Two!"
They blasted as hard and as much as they can on the cardboard cutout. By the time they blasted the last bullet on their toy guns (it has a capacity of 150), the flat cardboard effigy fell down and was knocked over, opening the gate to the second and final part.
As they went to the last part of the room, Mallow and Gwen saw a time bomb in the room. They tapped the screen in the time-bomb's tap screen. It then turned on, showing a battle between them and Melisa Moondusk and Malice Sunshine, two Pizzards that are Gwen's enemies, in a Pokémon-like manner. It looked like it came from the first generation Pokémon games. They all have 1000 HP in the battle and have 50% of their moves in the move pool and some made-up moves.
"You have to deplete the enemies' HP down to 0. If they deplete yours to 0, the bomb will spread yucky goo all over the place. Don't worry, it is safe fore cheeseslimes!"
Gwen and Mallow chose moves in the Double Battle to attack the enemies in the game. They eventually used more moves that could help them defeat th simulated enemies in the game, so the bomb will not blow up.

(The types for the Pizza Tower OCs in the game:
Gwen - Poison/Dark
Melisa Moondusk - Dark/Ghost
Malice Sunshine - Dark/Fariy)

[INITIATE BATTLE]

[Melissa and Malice want a duel!]
[Gwen used Shadow Chain!]
[It's not really effective... (78 damage on Melisa)]
[Mallow used Gunk Shot!]
[It's Super Effective! (200 damage on Malice)]
[Melisa used Shadow Ball!]
[135 damage on Mallow]
[Malice used Dazzling Gleam!]
[123 damge on Gwen]
[Gwen used Astral Barrage!]
[142 damage on Melissa]
[Mallow used Sludge Bomb!]
[It's Super Effective! (198 damage on Malice)]
[Melissa used Dark Uproot!]
[It's not really effective... (45 damage on Gwen)]
[Malice used Psybean!]
[It's Super Effective! (205 damage on Mallow)]
[Gwen used Moonblast!]
[It's Super Effective! (204 damage on Melissa)]
[Mallow used Gunk Shot!]
[It's Super Effective! (205 damage on Malice)]
[Melissa used Psyshock!]
[It's Super Effective! (217 damage on Mallow)]
[Malice used Sunlaser Blast!]
[145 damage and Burn status on Gwen]
[Gwen used Healing Gleam!]
[Gwen and Mallow healed 350 HP and cured their status moves!]
[Mallow used Poison Fang!]
[A critical hit! (210 damage on Melissa)]
[Melissa used Moongeist Beam!]
[101 damage on Gwen]
[Malice used Light of Ruin!]
[It's Super Effective! (203 damage on Gwen)]
[147 damage on Mallow]
[Malice's light spell was so bright it burnt her eyes! (Malices loses 350 HP and gains Burn condition)]