You have to beat world 6
After the checkpoint in 7-6, there are blocks. Hit them to reveal a vine
Complete w7-6
get a red flag on the levl before it.
w4: beat the boss in w2 with mini Mario w7: do the same but in w5
Listen i have beaten the whole game and world 7 is the hardest one to get all the star coins. But alot of them you either have to be really small or be maximam hight.(Not huge mungo guy!)
By beating the world 5 boss with mini mario. You don't have to be mini the whole time. I would do the first few hits with fire or something, then turn into mini mario, do a ground pound, and kill the boss.
You have to beat world 5 boss with a tiny mushroom in your storage and when you deliver the final blow get the tiny mushroom
if you are serious if you are on 7-6 here is a walkthrough first make sure you killed all the koopas then jump over the p-plants.
Go to the end so that the flag pole is in site. Hit the first brick down to reveal a vine. Hit another brick to go down the vine and you will find the star
There are two ways to unlock World 7 in New Super Mario Bros.:Get there by using a cannon, orLand the last hit on the World 5 castle boss as Mini Mario/Luigi. If you do this, the sign that says 'W6' will flip around and change to 'W7'.
w7
You need to get this blue mushroom and it will turn u very tiny like you're miniature then go to the boss at the end and beat him miniature size then instead of jumping over the gap go down in the gap and you run straight and the sign will flip and it will say w7 on it and you're thereor you can go to the cannon on world four