Hold L + R at the level selection screen to display the code entry screen. Then, use the D-pad to enter one of the following codes. Press X to accept and activate the code.
Enter LVLANY1 as a code.
Disable level select
Enter LVLANY0 as a code.
Enter INVINC1 as a code.
Enter INVINC0 as a code.
Ghost In The Trap
On the Ghost In The Trap level in the Desert Oasis
world, when you get stuck in a trap turn and face the ghost. Once
the trap you are currently in opens, run to the next trap and
do the same thing. You will have to repeat this once more.
Strategy guides from GameFAQs