The Super Mario World thing in itself is particularly odd, since I'm willing to bet not as many people own that version as say they do.
There are four different cartridge variants (only three are in our database)
There"s the oldest release, which came with the system when it launched:
To my knowledge, this version never released in its own box and is in the database:
https://vgcollect.com/item/17329The second release, which is the most common I've come across on eBay and in stores. It has the lock mechanism on the cart. It released in console bundles and separately in its own box:
Funny enough, this cartridge has no entry in our database at the moment.
The third releases, which is identical to the second except that it doesn't have the lock mechanism on the cart. It may have been released in console bundles, but was mostly released in its own box from late '94 onward.
This is the one that appears in the database as Super Mario World:
https://vgcollect.com/item/6095 I'm very much doubting all 2600+ people have that cartridge.
The final release is probably the rarest since it's the Players Choice version, which didn't release until 1996 onward.
It is in the database:
https://vgcollect.com/item/10681