I started out molding the top with modified Rice Crispy Treats.
I added chunks of RC to the bottom- carving space for the center block and then molding them to resemble the real controller. (I compared to the real controller every step!)
I rolled Saran Wrap into the spaces left and let it dry overnight.
Before covering it with homemade fondant I filled in any gaps with a thin layer of fondant (smoothing the whole thing gently with my fondant roller) and I placed rings where I wanted the controller knobs, I didn’t want any seams on top- (there were plenty on the bottom though!)
The rest was just adding the details with my fondant cutter (to make all the lines) and colored fondant, then delivering this manly pink cake :). Let me know if you have any specific questions!