It's been more than 28 years of continuous evolution from Nintendo since they started at 1980 with Game & Watch and their latest product is Nintendo Wii. Some are well accepted, like SNES and Wii, but some doesn't get the same popularity, like N64. If you are interested to see the whole Nintendo tree, check this image (i don't put it on this blog, as it's too big, 1200x1333 pixels)
The interesting point is that Mario is always among the game published for each gaming console. Probably the second game is Zelda. It's as popular as Mario.