All weights are estimates. Games can obviously vary depending on the thickness of books or other included flyers as well as RPGs weighing more because of more rom chips and batteries. Controllers are generally for the most common 1st party for the system and loose consoles are just that. No cords of any kind included. This is just intended to be a rough estimate and does not include weight from packing said item up.
A CD case with no artwork is 2.4 oz/.068 kg
A slim CD case with no artwork is 1.5 oz/.042 kg
GC disc is .2 oz/.006 kg
Regular disc is .3 oz/.009 kg
CD sized bubble pack is .5 oz/.014 kg
DVD sized bubble pack is .8 oz/.023 kg
Obviously I can only weigh what I own or have pass through my hands, so if you have a weight to contribute, let me know.