World 1: 1-3 contains an alternate route that leads to the World-5 Cannon on the worldcontinue →
map. To find it, leap from Yoshi just above the ceiling with the hidden tunnel and dash
along the top to the right to find the warp pipe.
World 2: 2-6 contains an alternate exit that leads to a cannon on the world map, which can
blast you to World 5. Here's how to find it: Near the end of the level is a rep pipe high
above that can warp you to the hidden flag pole, but it requires both the use of a
Propeller Suit as well as the P-Switch a little ways before. Upon reaching the P-Switch,
wait nearby for a few moments until the Pink-block on the track moves further up the
track. Once it has, hit the switch, then make a mad dash toward the pipe by leaping from
the pink-block to a series of newly formed blocks, just below the pipe--propeller from
them (before they revert to coins!) into the pipe above to find the alternate exit.
World 3: The Ghost House contains a secret exit that leads to a cannon on the world map,
which will blast you to World 6. Here's how to find it: When you reach the room with the
rope running along the ceiling, follow the rope so you're just above the left-most
position of the first moving platform (that is, where it's positioned when it's moved all
the way left). Now wait for it to move away and drop off the rope--don't worry! You'll
hand in a hidden area below, containing a door. Now just follow the rest of the level to
the secret flag pole.
World 4: The Ghost House conceals an alternate route which will allow you to head straight
for the world's final castle, as well as hit-up a Gold Toad House along the way. To do so,
head to the ghost house's second room, where you'll find the raising and lowering
platforms. When you reach the one just below an item box, wait for it to drop completely,
revealing a hidden door. Head on through then proceed through the last door of the area to
find the secret flag pole!
World 5: There's a hidden route inside the ghost house that, when taken, allows access to
the cannon on the world map that'll blast you to World 8. So here's how you find it:
Inside the Ghost House's first room, drop down the first shaft, jump the second, climb the
stairs and jump the third. Drop down the shaft at the otherwise dead-end, then drop down
the gap just beyond to find a door. Ignore the door and head left through a fake wall to
find a second door. Head on through--this will eventually lead...