The Tokyo District Court yesterday ruled that the R4 device -- officially known as the "R4 Revolution for DS" -- can not be sold in Japan. The R4 allows easy software piracy for the DS. It fits into the DS's cartridge slot. Data is stored on a Micro SD and downloaded from websites via a flash drive, and the R4 has a small slot that the Micro SD card slides into. Bam: Pirated games.
So far, sale of the device has only officially been outlawed in Japan. Nintendo and 53 other companies took the manufacturer of the device to court. Nintendo and the rest vow to continue the legal fight against piracy, saying they'll continue to pursue other manufacturers of similar devices.