These probably shouldn't be placing pages in the top-level game category because we will be putting them in sub-categories whenever possible, e.g. Category:Mega Man 1 enemies. Top-level category should contain the game itself, things that don't fit anywhere else, and the sub-categories for enemies, Robot Masters, etc.
I think putting them in top-levels too could make sense for the subject-related categories (someone may want to browse all Robot Master pages at once via category, for example), but it doesn't make much sense for game categories since it would be a mix of completely different things. The navbox makes them browsable in that manner because it has labels.--Vellidragon (talk) 21:21, 2 May 2020 (UTC)