Easy! Take a secret exit from: World 1 Tower or World 2 Tower and get in the canon, and blast to world 5. Take a secret exit from World 5 Ghost House to get to world 8.
you cant
There are hidden exits on some levels, and when completed, will open up the warp cannon. Warp cannons will transport you 4 worlds ahead, for example, the warp cannon in world 1 will transport you to world 5.
Well, I know there are not CODES. However, there are cheats. I only know warps. The way to warp on worlds is collect all the star coins. Therefore, the cannon's path will open. Go to the cannon. It will warp you. If you want CHEATS, type in questions for cheats on Google. If you need cheats for Super Mario Bros. 1 NES ( Nintendo entertainment system ) warps for Super Mario Bros. 2 NES, or cheats for Super Mario Bros. 3 NES, just ask the question! I possibly will find it. and ill help as much as possible.
World 7
give up.
get the world 5 cannon
You have to get the secret exit's in every world and the secret worlds
get the cannon in the worlds
The cannon in new super Mario bros takes you from one world to another without having to complete the world (ie it shoots you into another world)
in world 1 at the tower there is a red flag that you need to get to unlock the cannon.
Theres a secret exit in the fortress
Complete level 6 sfeb5h6bgtegbu