N64 cartridges in DS cases.

[Dravenae]

Those are EU DS cases. I just took one of my spare cases and tried to stick a N64 game in there, to check if there's even a remote chance of the game fitting. By the looks of it, the cart might just fit. It means gutting both the DS and GBA cart holders, and the top bracket on the front of the case, but it could work. I'm not sure if I can spare one of my cases to experiment, but after I check out my want list and see how many spare cases I have, I'll let you know.

Took one of your spare EU cases or US cases?

EU Cases. I get them for free, so I use them.

[Dravenae]

I think RetroGameTech, actually has another video describing how he fit those games into the gases.

[Dravenae]

http://www.youtube.com/watch?v=8IkHZKwXkL0

As you can see there, the N64 cart aren't much bigger than the 32x games. I haven't had a chance to look at my want list yet, so I don't know if I can spare a case to experiment.

The cases in the video has 3DS art, but they are definitely DS cases.

If you follow his example, whilst also removing the top tab on the front of the case, you should be fine. (That's if you want to try that).

I think someone here said to use a 8 disc poly case, and if your live in the US, that would probably the cheaper option, rather than having to pay shipping costs. However if you live in the EU, feel free to tinker into your local GameStop and ask them if they have spare DS cases lying around that you could take. My local GameStop's employee's are all my friends, so they save the DS cases for me. That's how I get mine free.

[Dr.Agon]

N64 carts fit in EU DS cases, not perfectly there is a slight bulge, but they do fit
you do have to remove both cart slots and a couple of bits on the manual side
i can upload pics/vids if necessary

[Dr.Agon]

also,

living in the USA and have no access to EURO cases, why not try making double wide cases? your games would definatly fit then!

[Dravenae]

also,

living in the USA and have no access to EURO cases, why not try making double wide cases? your games would definatly fit then!

^This is always an option!