Hello everyone.
It has come to my attention that the category "Jem Universe" is one of the most popular among editors, as many articles are frequently added into this category. However, maybe its intended usage is not clear for some users, so I'll try to elaborate on the topic.
This category is intended to include the most basic elements within the fictitious world the characters of Jem live in. Think of it as a category that lists the highest level of a certain thing and from there it works down to most specific variants.
For example, "Vehicles" is included in "Jem Universe" because we're talking about cars or other vehicles in general. Adding the Rockin' Roadster would be incorrect, as it is already included in the "Vehicles" category. Otherwise, then almost every article within the wiki (characters, locations, organizations, etc.) would have to be added to the "Jem Universe" category, making useless the purpose of narrowing results in searches by using a certain criteria.
A small exception is the Jem Bible page, which is included into this category and not considered to be in the Merchandise page because it is an autonomous document that dictates the rules of the world of Jem.
Thanks for reading and keep up the good work.
Regards.