The DSX is a console supposedly being made by Fun Dimension. It is supposedly named the "Dual Screen Xtreme", but this was confirmed by Peanutjon as a joke. It was never announced, and instead Super Mario 64 DSX was confirmed. When asked what the DSX was, Peanutjon said it was something they were making, and they called it the Dual Screen Xtreme, though, as said above, this was revealed to be a joke name. They are currently in the process of making it, if it exists.