Its cool to see all the different variants as it relates to some of the older items. Its always a pain when identifying even some of the newer variants due to case swaps etc. While I don't plan on making a lot of edits to the category (at least at the minute haha), I'd assume we should post matching listings such as Ebay in "Error listings and rejected edits" thread when submitting variant edits?
It is my recommendation that you should not bother with attempting to do a full console category variation update without going all out. That means to document the box info, the carts, the manual/s and the inserts for each and every one. I did this for Sega Genesis [NA] and it took at least a month to do it. I previously had done it for PS2 hw which was much more difficult and took three months. You can do something like this for a particular game. For example I had done it a couple time for a game that I own, to find the variations of it and add just those.
For determining swaps, what I end up doing is starting with a single release. Then go on ebay (or wherever) and make a list of each combination and then how many instances of that combination are found. If it is a fairly common game with multiple vars, you will be able to determine which are most likely. An example
Instance 1 (found 20 times)
- cart made in 1
- cart label 1
- manual 1
- upc 1
- box number 1
Instance 2 (found 17 times)
- cart made in 2
- cart label 1
- manual 2
- upc 1
- box number 2
Instance 3 (found 2 times)
- cart label 2
- manual 1
- box number 1
Instance 4 (found 1 time)
- cart label 1
- box 2
You can figure out which ones are likely to be piecemealed and thus be able to determine what the correct contents are. If it is an item that you just can't find enough examples of, then don't bother adding the particular details or perhaps don't even add the item to the DB at all. So you being able to find something different on Ebay isn't enough to post it to Listing Errors, rather you would have to say "I found this combination on Ebay x times, here is an itm number example, and this other combination x times, here is an Ebay itm example" type post because if you aren't going to do that work, then we're going to have to do it for verification purposes.
I can understand that someone may want to not do a full on tackling of the NES [US] category because it is a lot of work to do and not easy like using a reference site to add missing entries.
Excitebike (5 screw cartridge / Nintendo Entertainment System)
Excitebike (5 screw cartridge / Nintendo Entertainment System™)
Excitebike (5 screw cartridge / Nintendo Entertainment System®)
Likely do not need "Nintendo Entertainment" in descriptor, just System, System™ and System® should be enough.