What is a Mii Studio code?
Nintendo's official online Mii editor can be accessed by signing into your My Nintendo account. From there, click the icon in the top right (it should either be a Mii or a gray default icon). It will pull out a menu from the right side of the screen. Click the "Account settings" button. Once again, click the icon in the left or center of the screen (it should be the same Mii or gray icon from before) to be taken to the Mii Studio. Here, you can create and save up to 6 Miis online.
Next, bookmark the following code written by myself and polished by bendevnull:
You can simply save it like you would a regular link.
To load a Mii from the Mii Library, create a new Mii and immediately save it. Click the Mii again to edit it, and then click the bookmark you saved earlier that contained the Mii Studio Mii loader code. A prompt will appear. Press the "OK" button, then paste the Mii Studio code of the Mii you want to load into the Mii Studio. Once done, refresh the page, click "Continue editing", and the Mii you loaded should appear. Feel free to save the Mii to your Mii Studio library.
You can also use this tool to save your personal Miis as files to your device. Simply edit the Mii you want to save, make a change and immediately revert the change (this is to load the Mii data into your device's local storage), click the bookmark to run the Mii Studio Mii loader code, and click the "Cancel" button. It should download a .txt file named various characters - this is just the Mii's Mii ID and can be renamed if you'd like. Inside the .txt file is that Mii's Mii Studio code. This way, you can store far more than just 6 Miis in the Mii Studio by saving them all to your device.
How can Switch Miis have QR codes?
Wii U and 3DS Miis can be shared via generated QR codes, however, as Miis made the jump to the Switch, this feature was removed. Despite this, if a Switch Mii is saved to an amiibo figure, the system converts the Mii to a Wii U/3DS-format Mii data file. Additional Switch-exclusive features are stored as bytes after the Mii data file. This means that we have an official way to convert Switch Miis to Wii U/3DS-format, and from there, we can make QR codes, and face/full body images. Of course, this will lose Switch-exclusive information and replace it with the closest available option the Wii U/3DS supports (like Aerith's unique eye color getting converted to a default green color).
By default, Switch Miis converted this way are considered Wii U Miis, and have Sharing on and Copying off. As with all Miis on the site, Copying is turned on for the QR codes. Additional information like Mii ID's creation time, console ID, and console MAC are simply randomly generated by the Switch when converting. The Mii is also marked as invalid, so should it be directly imported to a Wii U or 3DS console, the system will automatically delete it as soon as possible. So, as with all QR codes for the site, this information is also adjusted - information that does not affect the actual Mii itself in any way whatsoever.
What is unused Mii data?
Unused Mii data is data that can't be seen just by looking at the Mii, even in an official Mii Maker application. It includes things like Mii ID (an identifier unique to every Mii, used by games to save data to Miis without having to store entire copies of the Mii), console ID (an identifier unique to every device/console, often used to control things like blue pants), and things like facial hair or glasses color.
You see, when you make a Mii, and you give that Mii orange glasses, what happens when you take those glasses away? The glasses themselves get removed, but the color still lingers in the Mii data file. You can see this by re-adding glasses back onto the Mii. They should still appear orange. When you give a Mii a mole, and you move that mole to a very distinct position, and you later disable that mole, what happens? The same process applies. If you re-enable the mole onto the Mii, the mole will still snap back to the position you set it to. Many Miis have leftover data like this in their Mii data files, and that's often what unused Mii data refers to.
Of course, it could also refer to things like creator names, birthdays, and often even Mii names, but those are often self-explanatory.
When will [X] game be added to the site?/Can you add the Miis from [X]?
I do not currently have a time estimate on when Miis from any specific game or application will be added. I also don't currently have a list of games/apps that I add to the site in order. Apologies.
How do we know the exact time some Miis were created?
Every single Mii has a unique number attached to it - this is called the Mii ID. Mii IDs have to be different for every single Mii ever created, or else they break games and the editors they were made in. Because of this, Nintendo wanted to be absolutely sure it would be as difficult as possible to run into two Miis with the same Mii ID. Randomly generating the Mii IDs would not be enough. (At least, for the Wii and Wii U/3DS formats, which only hold up to 8 bytes for Mii IDs - the Switch Mii IDs are 16 bytes long and are indeed randomly generated.) Nintendo's solution was to make the Mii ID, essentially, a clock. The Mii ID is tied to when exactly you made your Mii, down to the second (give or take 2 or 4). This way, the only way anyone could run into two Miis with the exact same Mii ID was if they were both made at the exact same second, and getting two devices to sync seconds up (as this is all running off of system time) is not something that's easy. One would already have to know of this in order to get it to happen.
But, anyways, because of this unique solution, it does mean we can reverse this process of Mii ID creation to read Mii IDs, and get the exact time and date a Mii was created if the Mii has a Mii ID attached in their Mii data file (which, when it comes to Miis on the Mii Library, is actually quite rare!). The clock for Wii-format Miis starts counting on January 1st, 2006, and goes up by 1 every 4 seconds. On the other hand, the Wii U/3DS-format Miis starts counting on January 1st, 2010, and goes up by 1 every 2 seconds.
What is CPU Mii Strength?
You may have noticed that the Wii Sports and Wii Sports Resort Miis have information on their pages relating to their Strength value in many sports in the game. Allow me to explain how the Strength value works.
In Wii Sports, the Strength value ranges from 0 to 59, as there are 60 Miis total in that game. In Wii Sports Resort, the Strength value ranges from 0 to 99, as there are 100 Miis in that game. The closer to the number 0 the Mii is, the better they are. For example, Matt (Wii) has a Strength of 0 for Swordplay in Wii Sports Resort, as he is the champion of that sport. Meanwhile, Ryan has a Strength of 99 for Swordplay, as he is the worst in that sport and is the first Mii the player encounters when playing Swordplay for the first time. This is how the game decides who is ranked where. Not by their skill points ranges, but by a simple ranking scale.
Sometimes, the values can mean more than just skill level. For example, Wii Sports Boxing skill rankings 39 to 59 (inclusive) are completely unused in that game, as those Miis simply do not appear. If you swapped Lucía and Matt (Wii)'s Strength values in the sport, Matt (Wii) would simply no longer appear in the sport, and Lucía would instead be the champion, as her original Strength value is 47. In Wii Sports Resort Cycling, a skill level of 98 would assign that Mii as the referee, and a skill level of 99 would assign the Mii to the Cycling coach.
What are the different Mii data file types?
For a short and simple explanation of all of them, I suggest you check out the README file on my GitHub repository "MiiDataFiles". This explains every format, and every extension, with updated descriptions by myself.
Some Miis have titles above their icons. What do they mean?
You see, not all Miis end up appearing in their games. Some Miis end up left unused in the game files. Sometimes, these Miis were meant to go unused, such as Miis that were meant to simply be used for testing. Some Miis only exist to appear in promo art, but ended up getting included in the files anyways. Some Miis, however, were meant to be in the game at some point, but ended up being changed, swapped out, or entirely removed (my favorite example being the Wii Music Mii Michael Tutori). And some Miis were straight up mistakes. There are even some cases where a Mii is technically used, but is never rendered or shown in-game. Lastly, some Miis will only appear in specific versions/regions of the game.
As you can see, a Mii can go unused for various reasons. Thus, I label these Miis differently depending on their type.
Any Mii that gets loaded in one version of the game, but is entirely unused in another version of the game (for example, Nintendo eShop Mii #5 from the WaraWara Plaza only appears on USA and JPN consoles, never on PAL consoles) would fall under the REGION-SPECIFIC category.
Any Mii that is found in game files but does not actually appear in the game, but does appear in promo art released for the game would fall under the PROMO ART category. A recent example is PR_WOMAN from the files of Mario Golf: Super Rush, who is seen in lots of promo art, but nowhere in-game. Other examples include many of the Nintendo Land Miis, which only exist to appear in promo art for Wii U titles and nothing else.
Lastly, any Mii that is in the game files and goes completely unused, but doesn't appear in any promo art or similar, would simply be UNUSED. The most recent unused Mii would be Sordsman from Super Smash Bros. Ultimate. Miis like him are mistakes, and not meant to really exist. However, there are some Miis like the Check Miis from Nintendo Land that exist merely to serve as a "test" for something.
Miis that fall under these categories will have a colored banner above their Mii in navigation pages.
Will the Mii Library ever be available in other languages?
While I would absolutely love to have the Mii Library be available in as many other languages possible, I unfortunately can not afford translators right now. When I need to translate something for the Mii Library, I usually ask one of my friends to translate it, but it's hardly ever longer than a few sentences at a time. They can't translate full pages full-time without being paid (assuming they'd even want to in the first place) and I don't have the money to pay them right now. Maybe later down the line once I have that kind of income, I'd like to prioritize adding Japanese to the site, as I imagine that's the second most popular language of the people who visit the Mii Library (given Nintendo's based in Japan and there are many Japanese-exclusive Mii-related things and all), with German, Spanish, and French also being on the mind. I don't know about other languages though. Only time will tell - and I'd be lucky to get these added to the site in the first place!Optionally, if you want to donate to me so I can one day afford translators, my Patreon and Ko-fi are available...
Where can I follow a changelog of updates for the site?
You can read a changelog of everything I change in the #mii-library-updates channel in my Discord server. If that's all you are interested in, feel free to mute all the other channels. Don't worry, I won't be upset. :) But, even if you are only there for the Mii Library changelog, I still highly suggest getting pronoun roles in the #roles channel.
Will the Mii Library be available as a wiki, where anyone can edit pages?
The Mii Library will not be a wiki site, for several reasons. The main reason is that the Mii Library is my largest passion project. I simply must make sure all data on the entire website is completely accurate to my knowledge. The only way I can ensure that is if I'm the sole curator. Of course, me being the sole curator, this means there's bound to be errors I have missed as well. If you see any of these, please contact me and let me know immediately, and I will fix it in the next update. Miis are niche and the site is small enough that this is a manageable way of the community correcting errors. It is certainly far more manageable than me needing to manually double-check every edit the site has, should it be a community wiki instead. Which is something I would need to do.
The second main reason is that... well, who else do you see doing stuff like this? I'm one of the few people on the internet to be digging this deep and technical into Mii content. Opening the Mii Library to be a community wiki... who exactly would be editing pages, adding the same kind of information that the Mii Library so heavily focuses on? Sure, it'd help spelling mistakes get fixed quicker, and similar patches like that, but so few people are on the same technical level as myself when it comes to Miis that I just don't see it being worth the effort. This isn't to say I'm the only one, though. The Mii Library has had many people contribute to it in many different ways; I'm just the one who catalogs them all on the pages. My ability to do all of this, and for that matter, my interest in all of this simply wouldn't have been possible if not for the efforts of the people before me. But, again, despite all of this, the number of people who do all of this are still so few in number that I've contacted most of them and in many ways those people have already contributed to the Mii Library.
If you still are looking for a Mii-focused wiki, you can visit the Wii Sports Fandom wiki. It is not held to nearly the same level of presentation as the Mii Library, but much of the information on the Miis' pages are just as accurate, and sometimes even pulled directly from my website. The QR codes seen on the Miis' pages in the Wii Sports Fandom wiki are also made by me (with the exception of the 40 Miis introduced in Wii Sports Resort - so only the 60 Wii Sports Miis and the 111 Wii U/3DS CPU Miis have my QR codes). The wiki has also been expanding to other games in the Wii series, like Wii Music and Wii Fit Miis. I hope, if you are looking for a Mii wiki you can directly contribute to by editing pages, that this is satisfactory.
Do I need to credit you for anything?
These Miis are often original discoveries of mine, as very few people have documented even the popular Miis (like those from Wii Sports), much less Miis from games in more obscure titles (like Bejeweled 2) or Miis in file formats that no one has documented before (like Switch Miis). Sometimes, I've discovered things about Miis we already knew existed but didn't know everything about; for example, Ray the Rhythm Boxing coach from Wii Fit has never had his name revealed in-game or in any official press release of any kind. His name was entirely unknown, much less his birthday or creator name. However, after I explored his Mii data file, I found such information and have since released it to the public. Things like this (ex. merely mentioning Ray's name) does not require you to credit me at all.
Though, if you download a QR code from the Mii Library and repost it somewhere else, crediting me as HEYimHeroic would be very kind. Documenting and extracting all of these Miis takes a very long time, and collecting all of this information (often in formats previously entirely undocumented) and understanding and compiling all of it into a website like this takes even longer. The Mii Library is a very long project of mine, and while I couldn't have done it without the help of others, the majority of content on this website is of my own findings. I understand if you feel like simply taking a Mii data file and turning it into a usable QR code is simple enough, but I'm doing this on a massive scale, and there are lots of things I do to ensure the QR codes are as compatible as possible.
TL;DR - I can't force you to credit me for any of this, but it would really help me out. :)