It's not a boombox, it's clearly stated that it's the most advanced gaming system created by humans. It's SPHERICAL.

Seriously though, there's no reason you couldn't make a console in whatever shape you want. It's just plastic. The limiting factor would only be size. You could make one in the shape of a dildo, as long as somewhere in the design is large enough to hold the electronics of the console you are running. Making it a sphere would be rather simple. There's not really a reason to do it, it's a huge waste of space and if you're even being so specific that it can't have a flat bottom to remain in a specific orientation, then it wouldn't be a very practical solution either.