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Ensata is an NDS emulator made by Nintendo., named after the prototype name of the Nintendo DS. It's function was to be a quick debugger for developers and eventually it ran commercial games - though compatibilty is very low. Two versions (v1.3 and v1.4d) were actually leaked versions from official sources, albeit cracked in a way that let users play games through these emulators. An interesting function is its ability to emulate the physical gap between the two screens of an actual Nintendo DS system.