Actually, the first Mario game was the best seller. It sold over 40 million copies. SMB3 sold like about 17 million copies to this day.
But yes, this game is so great and I am still addicted to it.
best selling nes game that wasn't bundled with the system
*edit* I never think I'm gonna have success with the frog suite. It's too annoying to play with that thing.
I found this website that has absolutely every single piece of information about mario 3http://www.themushroomkingdom.net/games/smb3
It even tells you about the unused level and sprite data which has been found in the rom. Including 2 new enemies (slightly modified versions of other enemies you encounter), as well as the debug mode and the unused bonus level
I love how this game rewards you for so many different little difficult things. I think what truly gives a game replay value is a game that rewards you in the most ways possible for doing stuff that's difficult