Nintendo made a lot of mistakes with the GameCube.
If they had launched it a year earlier with less of a kid design and games like Perfect Dark and Zelda: Majora's Mask as re-purposed launch titles .... they probably would've had a fairly comfortable no.2 finish of 35-50 million consoles IMO.
They gave Sony way too much time to build a massive lead and took Microsoft too lightly and also I think Miyamoto's crew over NCL rebelled against NOA who at the time was carrying Nintendo in some respects with things like GoldenEye/Perfect Dark, Nintendo Sports, Star Wars cross-marketing, etc.
I think they wanted to reassert themselves and purposely made the GameCube look overly kid-like but in doing so sabotaged the machine's success for their own egos.







