Super mario bros on DS

[Star-girl]

Does any1 know how 2 get into world 4 and 7 on super mario bros on the DS? I've completed all other worlds but dont know how 2 get into these ones! x

[babybop6379]

i dont know if this is any good to you as i havnt played the ds one but on the others sometimes the secret doors can be in the air or under the sea or behind false walls!!! good luck with finding them xxx

[samwin]

try this

http://uk.guides.ign.com/guides/682879/

[pericat]

You have to beat the guy at the end with a mini mario then when you get key he will follow the signs for worlds 4 and 7

[Star-girl]

Thanx for all ur answers guys xx