You might consider creating an account so that your contributions will be attributed to your name. If you want to create an account you can do this by opening the special page Log in / create account.
Fore more help, please refer to the main help page in Wikia help.
Creating an account on Wikia is free and easy, and a great way to join a passionate community of people who love what you love. Having an account also gives you extra abilities and features that un-registered users do not have access to. Your account is used on every Wikia wiki, so you only need to create it once and you will be able to log into every Wikia community.
On the top right of every page on Wikia, you will find links to create an account, sign in as well as use facebook connect to log in. You can also visit Special:Signup
An account creation page will load, and allow you to fill in your account details.
If you forget your password, you can easily have a new one sent to you on the Log-in page. Simply click on the Log-in text on the top right. You can then choose to have a new password emailed to you.
If you remember your password, and simply want to change it, visit Special:changepassword.
It is not possible for accounts on Wikia to be fully deleted, but they can be disabled.
If you want to use a different username, you can create a new account and begin using the new one instead (or rename the account). If there is a risk you will be suspected of "sockpuppetry" (using two or more duplicated accounts for malicious purposes such as double voting), and you should add a note to the user page of the sockpuppet accounts to make it clear you have changed your username.