you either pay for it with th gold coins you can collect throughout, or you have to search for a hidden tunnel or something. if you find one you need to find a way to get to it.
my suggestion: if it is up high i suggest flying to get there. if you are skilled enough you will know how to that but i can not tell you how to fly.sorry :(
Complete level six on world eight.
how do you pass world 6 on level 6 on new super Mario bros
if you mean new super Mario bros, then you beat world 6 castle when you are mini Mario.
World 7 is unlocked when you complete World 6 and so on.
look up super Mario bros Cannon world 1 and level 1
no in new super Mario bros there is no level 0 there is only worlds like world 1,2,3,4,5,6,7,8
Beat world seven.
On the last level of world 2 use tiny Mario to fight the monster and you can get to world 4 with tiny Mario
you bet world 6.
In Super Mario World 2: Yoshi's Island, The game autosaves after you finish a level.
beat level 7a
It's a cloud level, then it takes you to World 8, which is a lava level .