Thread:Sinjoh/@comment-35098892-20200203153904/@comment-4136655-20200203160151

This is because our infoboxes call upon our CSS for their appearance, rather than just coding it in the template wholesale, which you can see if you compare the wiki's current Contestant template to yours. You would have to add code from our MediaWiki:Common.css (Ctrl+f infobox and add the import code at the top for the theme) and MediaWiki:Themes.css (which you may need to create) to achieve this.

Additionally, we did have someone from Fandom do this for us, so you might be able to get help from them if need be.