It is possible, but uncommon, that the Scratch Team may make an exception upon request for usernames that reveal personal information or cause gender dysphoria, and in general this only will be done for well-established Scratchers. The Scratch Team will then transfer all projects, loves, favorites, and other information to a new account with a different username.
The practice of creating a new account in order to obtain a new username is known as "account moving". One can remix all their previous projects and invite the new account to all the previous studios and then promote it to manager in all of them. This will move almost all of what was on the old account, although the project and account statistics will be lost (e.g. followers). One will still have to get the Scratcher rank for the new account, though, which can interfere with moving projects with cloud variables.
The idea of users being able to change their usernames has been suggested and declined many times as it would cause a lot of confusion about who is whom. As a result, changing usernames is on the official list of rejected suggestions. However, changing the cases of letters in one's username is not rejected but also has not been implemented.
- Za-Chary. (16/07/21). "I would like to see if it is possible to word it in such a way that you are not giving a 'complete list' of times when a username could be changed, while also highlighting that, in general, username changes are not possible. Typically, those whose usernames are changed have already established themselves as being a positive member of the Scratch community, e.g. by sharing lots of projects and having an account for a long time." users:Za-Chary#comments-150928057
- Za-Chary. (16/07/21). "The only reasons I have ever seen a username get changed is for it being their real name and for gender dysphoria (the latter of which I have only seen one case for). I'm not sure that we would change a username because it is 'inappropriate' — I would think we would catch the inappropriate username sooner than later." users:Za-Chary#comments-150928247
- users:Paddle2See/#comments-51377931[dead link]