In one of the levels near a cannon in any world, there is a secret passage,pipe,vine ect. that you must find and use in the game. You can go on a cheats website and find out if you're having trouble.
Super Mario World
no
no there is not
skills
no
there is no world 9 in new super Mario bros. there is one in super Mario bros 3 though
super Mario world is a totally different game.
World 9 does not exist in New Super Mario Bros. DS
Technically, Super Mario World is already Super Mario Bros. 4. In fact, its working title before being released was "Super Mario World: Super Mario Bros. 4."
No.
Yes
No.