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The '''Japanese DSi Development Kit''', formely known as '''CPU-X4''' is a prototype that was used for development of Nintendo DS or DSi software. This unit is completely different from a retail unit.
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'''CPU-X4''', formely known as the '''Japanese Nintendo DSi Prototype''' is a prototype that was used for development of Nintendo DS or DSi software. This unit is completely different from a retail unit.
==Discovery==
==Discovery==