It's NEO2_mystic!hahahahaha.Well it's what say the name of the file so probably it's.
A better guest would be neo2 rumble,hahahah
Now a little more serious:Magickey 4 SD.
New joke:It's a wifi sd for nds,hahahahaha
Serious:I's a memory expansion for NDS so you can run more and better applications with a extra memory,because you can use this memory like an ram.
It's Neo 2 DS Serial = it's a cart that has tilt sensor and IR plus an usb support,just like Natrium's project.
For now,no ideas!But i will come with better ones,hahaha!
Neo2_radio:a device that you put in your nintendo ds that let's you listen to radios,not internet radios,normal radios like am and fm.I just got this idea while trying to sleep,now back to bed.