As noted earlier in a news article, Kingdom Hearts 3D had some nasty bugs hidden away in the game. One stopped you dead in your tracks with no way to continue the game. The problem is now solved with the latest patch for Japanese KH:3D owners. You can easily download the patch by scanning the QR code or by downloading it from the eShop.
I’m hoping that the international copies of the game have the bugs fixed from the start. Square usually updates the games with the international release so I’m sure many of you won’t be encountering these critical glitches.

Source: GoNintendo