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A Modding Tool for Super Smash Bros. Ultimate


Quasar v1.5.0.5 2mo
  • Adjustment ARCropolis v0.9.0-Beta included
  • Overhaul Remade the whole app to ensure speed and ease of use
  • Addition Added new ways to transfer files
  • Overhaul Definitions for Fighter Skins
  • Overhaul Definitions for Fighter Skins
  • Overhaul Definitions for Fighter UI
  • Overhaul Definitions for Fighter Model
  • Addition Definitions for Fighter Effect
  • Addition Definitions for Fighter Parameters
  • Overhaul Definitions for Fighter Animations
  • Adjustment Definitions for Fighter Voice
  • Addition Definitions for Fighter Sounds
  • Overhaul Definitions for Stage UI
  • Overhaul Definitions for Stage Models and Skins
  • Addition Definitions for NRO files (and how they go in the plugins folder)
  • Overhaul Definitions for Music
  • Addition Definitions for Items
  • Addition Definitions for Common effects
  • Addition Definitions for Common parameters
  • Addition Definitions for CSS Layouts
  • Addition Definitions for Series Icons
  • Adjustment Fixed Result Stage and Final Destination definitions
Hi, again, sorry for the wait.
It's been a long time since I started on this one but the amount of work it took was just gigantic.

Anyway, more to come on the way, enjoy !
Quasar v1.1 3mo Adjustment2 Addition7 BugFix Overhaul Tweak2

1. What is Quasar?

  • Quasar is a mod Downloader, manager and updater for Ultimate. 
  • It serves as a Library for all the mods you download through it. 
  • Allows you to place the content wherever you like in game, and sets up your SD with those files so you don't have to.

2. How can I download mods?

Head over to the Super Smash Bros. Ultimate section of the website.
Then, when you're browsing a mod page you'll see a Quasar Download button that will trigger the download in Quasar.

3. I need help using this app, where can I find more information?

Head over to the wiki on Quasar's Github page

4. I think Quasar's not installing a mod properly, what can I do?

Quasar is a definitions based mod manager. That means that it can handle mod types such as skins, UI, voices and such if I've provided the definition for those. Sometimes, specific files aren't defined while other times, mods are not in a recent format. When that arrives, Quasar is not able to handle them.

But please know that I'm aiming for the most compatibility for every mod you can throw at Quasar. I will be updating it so it can support as much as possible.

If you think you've found a mod that isn't handled or a bug, you can report it to me on this discord server below:

Quasar's discord server


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  • sorasin avatar
    sorasin Joined 23d ago
    hi there,

    i have quasar working (mostly) but i am encountering a small issue when trying to use it in combination with ARCadia.

    Quasar creates a filepath in the root folder "Quasar\My Workspace\arc\etc" but ARCacadia shows an error using that format saying "Quasar\My Workspace\mods does not exist". 

    I can resolve this issue by creating a folder called mods in My Workspace folder and moving the arc folder and anything inside it into mods. 

    Any subsequent mods I install cause Quasar to create another "arc" folder in the Workspace and I need to move them back into the mods folder every time.

    Do you know a workaround to this?
    URL to post:
  • hey, might be a stupid question but I havent seen anywhere about it
    do you need to homebrew your switch to use this?
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  • HootsHugs101 avatar
    HootsHugs101 username pic Joined 4y ago
    559 points Ranked 45,956th
    8 medals 1 legendary
    • Became a Ripe Supporter Medal icon
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    Does it know where to put SaltySD/NX Files?
    I wish Lolis were real.
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  • i have a issue while installing queasar, when i open it,it says than the .exe file is missed, then i repair it and it just delete by itself again, someone can help me? :(
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  • Question: I already have quite a few mods downloaded without Quasar in a folder on my computer titled "Smash Mods". Can I transfer the contents of this folder to Quasar or do I have to redownload them all?
    URL to post:
  • KingKRool2002 avatar
    KingKRool2002 Joined 3y ago
    673 points Ranked 44,381st
    I would also like to know if it works with yuzu. Thanks.
    • Interesting x 1
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  • Crafty21 avatar
    Crafty21 Joined 3y ago
    1,692 points Ranked 21,848th
    8 medals 1 legendary 1 rare
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    3mo 3mo
    Is This Yuzu Compatible?? If yes how does it work with it? 
    URL to post:
  • So I have the mods installed on the application, but how do I send it to my SD card or view the mod outside of the app? Oof.
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  • Blucas! avatar
    Blucas! Joined 8mo ago
    967 points Ranked 41,878th
    I'm still a bit confused of the benefits this has exactly? What would I get out of using it?
    URL to post:
  • Oersted avatar
    Oersted Joined 1y ago
    RPG-FES Manager
    37 points Ranked 72,299th
    10 medals 3 rare
    • Achieved Game Manager clearance Medal icon
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    • 1 post awarded Exemplary Feedback Medal icon
    It has returned, let's hope that I can make Arcopolis actually work to use it!
    Lucretian Knight
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