Nothing special happens after world 9. You can all levels now unlocked
you win the game In super Mario world 2 you go back to main map
There is NOT SUPER MARIO WORLD Wii...
beat world 6
Beat World 5 as Mini Mario.
Ok so on Super Mario Bros for the Nintendo to get to world 4 you have to go to world 2 and defeat it as tiny Mario then to get to world 7 you have to go defeat world 5 as tiny Marion there that is how you do it
you win the game In super Mario world 2 you go back to main map
There is NOT SUPER MARIO WORLD Wii...
Beat the world 2 boss as Mini Mario.
if you mean new super Mario bros, then you beat world 6 castle when you are mini Mario.
Beat world 3
Beat Petey Piranha as Mini Mario.
if you mean ds,beat world 2's boss as super mini mario.
Beat world five's boss as mini Mario/Luigi.
Beat world seven.
Beat world 2.
beat the castle in world 1
beat the sunken ghost ship