Board Thread:Support Requests - Getting Technical/@comment-34164900-20180101030952

I’m currently learning to use MediaWiki and wanted to change the look of theinfoboxes as practice. I also thought it is a good idea to copy the look of another infobox to another place to try working with that one however it did not work in many ways. How would I copy infoboxes like this one:

http://nanatsu-no-taizai.wikia.com/wiki/King

To another place?

And yes I am aware that this infobox uses CSS from MediaWiki:Themes.css

Thanks in advance! 