Have you had a look at Help:Infoboxes? It should help with creating infoboxes. ^^ Also, it typically may be good to not copy infoboxes from Wikipedia. You might have to copy various templates transcluded in infobox on Wikipedia to your wiki so that the infobox could work properly, and also have to modify it to the desired state if needed - which would be rather cumbersome; and FANDOM considers portable infoboxes as good practice. :)
Yeah, I agree that using Wikipedia infoboxes probably isn't a good idea.
I've made an portable infobox for fights on one of my wikis that I'd be willing to let you use and customize for your own wiki. Here's a link. The coding is typical for infoboxes, but uses <group layout="horizontal"> to indicate two sides of a fight, which was based off this Infobox on the Pirates of the Caribbean wiki.