3Ds has only been on sale in Japan since yesterday, and supposedly it has already been "hacked" to use R4 cards. According to a tipster of D'toid's, a YouTube video has been posted showing an R4 card ...

Having enjoyed a tremendous launch in Japan over the weekend, Nintendo’s 3DS has already received its first bit of bad news – hackers have got the R4 piracy device up and running on the handheld.