I've got an R4 that I used for my DS Lite back at home, and I just got a 3DS at college. Can anybody tell me if they think the R4 would work? It was just for the DS Lite, before the DSi came out.

His first post answered it when he said "Before the DSi came out"If it is just an R4 without the "i" then no it will not. There is R4i from $3.50 to $12 dollars now if you buy a new one. The card from www.r4ids.cn is fabulous.