caitlin-from-pokemon: You should use relative links in your HTML for links. Instead of making your link lead to "caitlin-from-pokemon.neocities.org/testpage.html" you should just make them lead to "/testpage.html". Then you can change your domain all you want with no issues.
Ok I realized the problem with the site post-rebrand and fixed it. Manually, though looking up an automatic solution would probably take more time! But it also means I'm more likely to have missed something, so please let me know if there are any links that are broken.