Super Mario XP
Go to the third pipe. Stand four blocks away from the
pipe to the right and [Shift] + [Up] to jump to
find a hidden box including a green mushroom that increases your
life. Then go four blocks back and stand on the pipe. Press [Down]
to crouch. You will warp to a secret location. Stand under the
pipe and jump to come back. Stand four blocks away from the pipe
to the right. Press [Shift] + [Up] to jump. Another
hidden box will appear.
Part 3 (underground path)
Go to the third pipe and crouch. You will warp to a
hidden location. Keep going until you reach the end. Jump into
the last pipe. As soon as you reach another location, go to the
right. Jump on the dent on the wall and do a high jump. A hidden
box will appear. A red mushroom will come out of the box. It increases
Keep going until you reach the top. Jump on the blue
object shaped like a circle and press [Shift] + [Up]
to destroy the walls. Keep going until you reach a pipe that has
"3" written on it. This will warp you to level 3. Continue
until you see two pipes with Piranha Plants in front of each other
in the opposite positions (one on the ceiling and one on the floor).
Stand on the first block after them and do a high jump. A hidden
box will appear.