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KoopalingTale is the Undertale AU created by DustyTheGoat, with the main inspiration being based off of the Super Mario series, with the majority of the characters being the Koopalings. This is also Dusty's favorite AU he's created, and he hopes to create a game for it in the future.

Story

A long time ago, two races ruled over the land, HEROS and VILLAINS. One day, war broke out between the two races, resulting in multiple kidnappings of citizens, including the HEROS's royalty. However, the HEROS eventually won. They killed the original VILLAIN's king, KING BOWSER, and they sealed the rest Underground with a magical barrier that requires seven HERO SOULs to break. As the prince at the time was too young, instead the other heir to the throne LUDWIG VON KOOPA took the role of king with his wife, ROSALINA. Then, after the death of the prince, KING LUDWIG VON KOOPA declared a second war on humanity: that any and all humans that fall into the Underground are to be reaped of their SOULs. Then, many years later, you fall into the Underground. Then, you decide their fate, either free them of their prison, leave them to die, or turn them all to dust.

Locations

Location Original Location Description Inspiration
The Ruined Observatory The Ruins A seemingly abandoned space station-looking place. The Comet Observatory, Super Mario Galaxy
Frostin Snowdin A frozen forest area. Frosted Glacier, New Super Mario Bros U/New Super Luigi U
Sparkling Falls Waterfall A sandy beach-like place with lots of waterfalls and huts. Sparkling Waters, New Super Mario Bros U/New Super Luigi U
Lavaland Hotland A lava filled area. Lethal Lava Land, Super Mario 64
PIPE MAZE The CORE A maze filled with and consisting of warp pipes. Duh... Pipe Maze/Pipe Land, Super Mario Bros 3
New Castle New Home A small area with Ludwig's home. Castle 8-4, Super Mario Bros 1

Characters

Character Role Description
Luigi Mario The Protagonist/Player Luigi, the character you play as. Unlike canon Frisk, he is actually much more expressive, even to the point of speaking full sentences.
Masky the Phanto The Empty One Masky the Phanto, the first character met upon falling into the Underground. He tries to act nice, trying to kill the player for their SOUL via use of "kindness keys", which are actually harmful. He is the deceased prince of the Underground reincarnated from death.
Rosalina Star The Caretaker Rosalina, former queen of the Underground and current caretaker of the Ruined Observatory. She is a motherly-like figure with a liking of bad puns.
Lemmy The Judge Lemmy, the lazy, punny, mysterious Koopa of Frostin. He may be lazy, but he is capable of running three sentry stations at once and a stand where he sells hot pockets (albeit, not legally).It is implied that he worked with Iggy and Kamek in the past, but no one knows for sure.
Larry The Ambitious Larry Koopa, or 'The Magnificent Larry'. Royal Guard wanna-be who tries to capture you throughout Frostin Woods. While he may seem hostile, he really wouldn't hurt a fly. He also loves making ravioli for others, despite the fact that it tastes terrible.
Roy The Captain of the Guard Captain Roy Koopa, the captain of the Royal Guard. He hunts Mario down through Sparkling Falls, in hopes of taking his SOUL and shattering the barrier. He is also great friends with Larry, but he can't let him join the Royal Guard because "he would be ripped to tiny smiling pieces." Also, in a Genocide Route, Roy is killed and turned into Roy the Reincarnated.
Iggy The Royal Scientist Iggy Koopa, Royal Scientist of the Underground. He has created many things in his life, mainly noting Wendy's robotic replacments and the Amalgamations. He also has a fondness for human anime and manga.
Wendyton The Celebrity Wendy, the sole star of the Underground. After a lava-based incident, she had to get most of her body replaced by Iggy. Afterwards, she became the Underground's number one (and only) star of television. Not to mention, everything is 'WNDY' brand. In fact, this is a WNDY-brand content cell!
King Ludwig von Koopa The Monarch King Ludwig von Koopa, the ruler of the Underground. He has done many regrettable things in his life, such as kill six humans for their SOULs. He wishes that Rosalina would take him back, despite the fact he knows she won't for as long as they shall live.
Mario Mario The Fallen Luigi's brother turned deceased megalomaniac, who wishes for the demise of humanity and enemykind alike. He wasn't always like this, though.
Bowser Junior The Soulless Angel The adopted prince of the Underground, he was raised for most of his life by Ludwig and Rosalina due to his actual father's death in the war. However, in a plan to escape the Underground, things go horribly wrong and he dies, his dust scattering onto flowers and a mask, which came to life after a determination experiment gone horribly wrong.

Minor Characters

Name Role Description
M. G. Kamek The Forgotten Scientist M. G. Kamek was the Royal Scientist before Iggy. He created the PIPE MAZE, but he disappeared soon after. Other than that, not much is actually known about him.
Morton The Recluse Morton goes to the Ruined Observatory every once in awhile, just to find a place to sleep. Rosalina (somehow) isn't aware of his presence.
Boom-Boom Kid The Idolizer Boom Boom hangs out with Mario through Sparkling Falls, and he just wants to see his idol, Roy, in combat.
Birdo The Outrageous Vendor Role Birdo hosts a Bake Sale in Lavaland with... interesting items. She also has a Bake Sale in the Ruined Observatory.
Kent C. Koopa The Perseverance Vendor Role Kent C. Koopa is an elder Koopa who is found running a shop in Sparkling Falls. All he really cares about is money. Why doesn't he replace Muffet? Because Birdo.
Koopie Koo The Trash Vendors Role Koopie Koo owns a trash shop next to Wendyton Hotel/Resort.
Charold The Transport Role Remember this guy from Super Paper Mario? Well, he's back, and he takes you between the three areas.

Music

Music Name Number Where It Plays Mario Lietmotif Undertale Lietmotif Link
In The Beginning #001 During the introduction story. Super Mario World - Title Screen Once Upon a Time
Select a File #002 When on the menu screen, when selecting your name. Super Mario World - Title Screen Start Menu
Your Friend, Masky! #003 During the first encounter with Masky. Super Mario Bros 2 - Underground Your Best Friend
Fallen Stars #004 During any passive encounters with Toriel. Super Mario Galaxy - Rosalina's Story Fallen Down
Ruined Observatory #005 While the player travels the Ruined Observatory. Super Mario Galaxy - Comet Observatory 3 The Ruins
Suspence #006 During enemy encounters while accompanied by Rosalina. Paper Mario - Battle Fanfare Anticipation
Unneeded Pressure #007 While the protagonist completes Rosalina's test of their independence. N/A Unnecessary Tension
Enemy Encounter #008 While fighting regular enemies (excluding Hard Mode/PIPE MAZE enemies). Paper Mario - Battle Fanfare Enemy Approaching
Bigmouthed Battle #009 During Morton's fight. Paper Mario: Color Splash - ME WILL ROCK ME Ghost Fight
Stay DETERMINED... #010 On the GAME OVER screen. Super Mario Galaxy - Game Over Determination
Rosalina's Home #011 In Rosalina's home. Super Mario Galaxy - Rosalina's Story Home
The Stars Shine Brighter #012 During the battle with Rosalina. Super Mario Galaxy - Gusty Garden Galaxy Heartache
the clown prince o' koopas. #013 During any passive interaction with Lemmy. Also plays in Fry Guy's, Lemmy and Larry's House and Morton's snail farm Yoshi's Island -Crystal Caves sans.
Myah Hah Hah! #014 During passive interactions with Larry, Also plays during the fight with Larry before he turns the protagonist's SOUL blue Super Mario Bros 3 - Hammer Bros Theme Nyeh Heh Heh!
Frosty #015 While walking through Frostin Woods. New Super Mario Bros U - Snow Overworld Snowy
Goattune #016 In any interaction that has the Irritating Goat. Super Mario Bros 1 - Overworld Dogsong
Koopa Theme #017 During the fights between Koopai, Greater Shell, Lesser Shell, and Koopamy and Kooparessa. Super Mario Kart - Koopa Troopa Beach ???
The Streets of Frostin Village #018 In Frostin Village. Super Mario 64 - Snow Mountain Snowdin Town
I'd Like To Buy #019 When interacting with a vendor. Mario Party - Mushroom Shop Shop
Shellshocked #020 During Larry's fight after turning the protagonist's SOUL blue. Super Mario Bros 3 - Hammer Bros Theme Bonetrousle
Hangout... Start? #021 During the hangout with Larry, before he gets bored. N/A Dating Start!
Have a Racket #022 During the tennis match with Larry. Mario Power Tennis - Menu Theme Bonetrousle
A Small, White Mask #023 When Lemmy tells you about Masky in Fry Guy's. ??? Premonition
The Captain of the Royal Guard #024 When Larry is reporting about the human to Roy in Sparkling Falls. Paper Mario: Color Splash - ROYal Rumble Danger Mystery
Roy #025 While hiding from Roy. Paper Mario: Color Splash - ROYal Rumble Undyne
Sparkling Falls #026 While walking through Sparkling Falls New Super Mario Bros U - Beach Theme Waterfall
Run For Your Life!! #027 When running from Roy. Super Mario Bros 1 - Castle Theme Run!
Silent Seas #028 In more populated parts of Sparkling Falls and Birdo's parlor in Lavaland. New Super Mario Bros U - Underwater Theme Quiet Water
Memories of a Fallen Brother #029 After placing the umbrella in the statue for the Piano Puzzle.

During the memory of Bowser Jr meeting the First Human. While Roy talks about Ludwig and Larry while befriending him. After sparing Ludwig. After the battle with Bowser Jr. The ending screen after the True Pacifist Ending Credits.

Super Mario Galaxy 2 - Boomsday Device Memory
Rockhead!! #031 During Pissed Thwomp's boss fight. Mario Kart 8 - Thwomp Ruins Dummy!
Pityful House #032 In Morton's house. Paper Mario: Color Splash - ME WILL ROCK ME Pathetic House
Mortune #033 A CD found in Morton's house. Paper Mario: Color Splash - ME WILL ROCK ME Spooktune
Charge of the Snailicorns #034 During the Thundersnailicorns minigame. N/A Thundersnail
Mowzie Village #035 In Mowzie Village. Paper Mario: The Thousand Year Door - Ms. Mowz Theme Temmie Village
Ms. Mowz Shop #036 In the Ms. Mowz Shop. Paper Mario: The Thousand Year Door - Ms. Mowz Theme Tem Shop
URAHH!! #037 Before fighting Roy.

While cooking with Roy. Sped up when Roy asks the protagonist if anime is real.

Paper Mario: Color Splash - ROYal Rumble NGAHHH!!
Bullets of Bravery #038 When fighting Roy. Paper Mario: Color Splash - ROYal Rumble Spear of Justice
Heat Wave #039 In the areas of Lavaland preceding the Lab. New Super Mario Bros Wii - Volcano Theme (Base) Ooo
Iggy #040 During interactions with Iggy. Paper Mario: Color Splash - Iggy's Theme Alphys
Showtime, Darlings! #041 Before Wendyton's quiz show. Paper Mario: Color Splash - Rumble with Wendy It's Showtime!
Jewel Crusher #042 During several encounters with Wendyton. Paper Mario: Color Splash - Rumble with Wendy Metal Crusher
Lava Waterfalls #043 While traveling through Lavaland. New Super Mario Bros Wii - Volcano Theme Another Medium
Tough Enemy Encounter #044 While fighting monsters in Hard Mode or the PIPE MAZE. Super Paper Mario - A Powerful Enemy Emerges Stronger Monsters
Hotel/Resort #045 In the WNDY Hotel/Resort. Paper Mario Color Splash - Fortune Island Hotel
Can This Really Be Called A Hotel Slash Resort? The Waffles Here Don't Even Come With Syrup Or Anything! #046 In the rightside hallway of WNDY hotel/resort. Paper Mario Color Splash - Fortune Island Can You Really Call This A Hotel, I Didn't Receive A Mint On My Pillow Or Anything
Reporting LIVE!! #047 During Wendyton's news segment. Paper Mario: Color Splash - Rumble with Wendy Live Report
Reporting DEATH!! #048 During the Bob-omb defusing section. Paper Mario: Color Splash - Rumble with Wendy Death Report
Waltz of the Subcons #049 During Birdo's boss fight. Super Mario Bros 2 - Overworld Theme Spider Dance
The Storm Has Migrated Elsewhere #050 While talking to Lemmy in WDNY Hotel's restaurant.

In Lemmy's Workshop.

Yoshi's Island - Crystal Caves It's Raining Somewhere Else
PIPE MAZE #051 While traveling through PIPE MAZE. Super Mario Bros 3 - Pipe Maze Overworld Theme CORE
Demise by Glamour #052 During Wendyton's fight. Super Mario Bros 3 - Pipe Maze Overworld Theme, Paper Mario: Color Splash - Rumble with Wendy Death by Glamour
For the Fans... #053 While Wendyton takes phone calls after her fight. Paper Mario Color Splash - Fortune Island For the Fans
KoopalingTale #054 When the protagonist travels through New Castle and hears the story of Bowser and the First Human. Super Mario World - Title Screen Undertale
Song That Has a Chance of Playing When You Fight Lemmy Koopa #055 Never actually plays. Yoshi's Island -Crystal Caves, Super Mario Bros 3 - Hammer Bros Theme Song That Might Play When You Fight Sans
Königimbergvon #056 Before the fight with Ludwig. Paper Mario: Color Splash - Battle with Ludwig Bergentrückung
LUDWIG #057 During Ludwig's boss fight. Paper Mario: Color Splash - Battle with Ludwig, Super Mario Galaxy - Gusty Garden Galaxy, Super Mario Galaxy - Game Over ASGORE
You Ignorant Fool #058 Before Hyper Masky's fight.

Before Bowser Jr's fight.

Super Mario Bros 2 - Underground You Idiot
Your Worst Nightmare, Masky! #059 During Hyper Masky's fight. Super Mario Bros 2 - Wart's Theme Your Best Nightmare
The Final Act #060 During Hyper Masky's fight after the Hero SOULs start helping you. Super Mario Bros 2 - Battle Theme Finale
Well, That's AN Ending... #061 During the phone calls of most Neutral Route endings

During the end of the battle with Roy if the protagonist kills him.

Super Mario World - Ending Theme An Ending
The Darkened Lab... #062 In the True Laboratory. Super Mario World - Ghost House Here We Are
Melted Monsters #063 When fighting the Monstrosities. Super Mario World - Ghost House Amalgam
Fire and Paint #064 During the first half of Bowser Junior's fight. Super Mario Galaxy 2 - Bowser Junior's Boomsday Machine Hopes and Dreams
SAVE the Mushroom World #065 During the second half of Bowser Junior's fight. Super Mario Galaxy 2 - Bowser Junior's Boomsday Machine SAVE the World
Jr's Theme #066 After Bowser Jr's theme. Super Mario Galaxy 2 - Bowser Junior's Boomsday Machine His Theme
Bring It In, Everybody! #067 During the credits. Super Mario World - Ending Theme Bring It In, Guys!
But the Earth Won't Turn to Dust #068 Before Roy the Reincarnated's fight. Paper Mario: Color Splash - ROYal Rumble But the Earth Refused to Die
Battle Against a True Royal Guardsman #069 During Roy the Reincarnated's fight. Paper Mario: Color Splash - ROYal Rumble Battle Against a True Hero
Wendyton NEXUS's TRUE Strength #070 During Wendyton NEXUS's "fight." Paper Mario: Color Splash - Rumble with Wendy The Power of NEO
LEMMYLOVANIA #071 During Lemmy's Genocide fight. Paper Mario: Color Splash - Lemmy's Grand Finale MEGALOVANIA

Trivia

  • This AU actually gives the glowing eye all Sans replacements have: "Storm's Eye"
  • The official name of Gaster Blasters in this AU are called 'Kamster Blamster'. Their appearance has yet to be made.

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