Assuming you're talking about the first game, all you have to do is complete the other 3 worlds. There's also a warp zone in 1-2 that has world 4 as an option.
There is no world 9 in super Mario bros. It only goes up to 8.
look up super Mario bros Cannon world 1 and level 1
yes and it is a city but to get it you have to get all the star coins in world 9 sorry if I am mixed up with[super mario galaxy]
Mario Lemieux was also known as "Super Mario"
give up.
Yes , there is a super Mario wiki , Look it up
Defeat the bosses whilst being tiny Mario. After beating them, Mario will fall under a small path, and you will end up in World 4 or 7.
In Super Mario World, Yoshi's eggs get capshered, and teams up with mario.
On the original Super Mario Brothers, I believe they just add up.
In Super Mario 64, press B. In Super Mario 64 DS, press your attack button. (A with the default settings) In New Super Mario Bros., walk into it while holding your dash button. In Super Mario Galaxy, you can't pick them up.
there is no world 9-9. It only goes up to 9-8
pcgame4fun (super Mario dress up)