J, the n64 was not a tremendous success for Nintendo. Their profits during the n64 generation were coming directly from the gameboy color released in 1998 and pokemon. Looking at the graphs is misleading if you think n64 was massively successful for them.
Even if they made 100$ profit per console, that's only 3.3B in profit @33m consoles sold.....
The GBC sold 120m IN THE SAME TIMEFRAME.....
n64 1996-2002
GBC 1998-2002
Now look at the graph again, 1996FY, 1997FY Wompwomp
Now look at 1998FY up to 2002FY- where the graph starts leveling even again.
Do your research man.