you have to find the secret exits in world 3 castle and world 6 castle at the end of them. they will involve you being the super small mario. that is all i will tell you.....
hi it is really quite simple once uve read a walkthrough lol
but if u cant be bothered just read on.
what u have to do is complete the last boss on world 2+5, only the actual boss, as mini mario because as u might have noticed the first time u completed it as normal mario there was a little path under where u ran.
right then the easiest way to do this is to get a mini mushroom from a mushroom house in ur item reserve and then just before u go on to battle the boss use the mini mushroom and when u wuld normally just jump on the boss u have to ground pound it (jump then press down) hit it three times and u will go down the small path and onto world 4 or 7.
if u have ne other problems as i have completed the whole game on ds e-mail me @ [email protected]
happy gaming
P.S. when u complete the game, on world 1 there is a blue mushroom house above level 1 in it there r 4 boxes with 20x star coins DONT GET THEM, what they are are diferent backgrounds for the lower screen and not diferent worlds SO not worth the coins!!
i completed the game in 2 days it is so short