I'm gonna say the WiiU simply because the fact that it had better features than the Switch in terms of the way we managed game files and save files and even the dual screen feature. Not sure why the hell Nintendo felt the need to go backwards with the Switch in this area.
The N64 and GCN already had great games and they were declining like the SNES did with the NES and I felt like I got to experience the full potential so I do not think they underperformed. It was just a time where Nintendo was seen as kiddie and PlayStation the cool kid on the block everyone wanted. So no matter what games it had, I do not think it would have beat Sony anyway.







