----------------------------Warp Whistles Locations-------------------------

Warp Whistle One: Located in World 1-3. Near the end of the level, just before a Para-Goomba that drops Micro-Goombas, stand on the White Platform. Duck down (hold DOWN) for 5 seconds to fall through the block. You can now walk behind the scenery. Run to the right at top speed to get behind the black at the end of the level (near the Card Box area). Continue running right to enter a hidden Mushroom House and claim the Whistle from a giant Treasure Box. Be careful not to jump over the entrance to the Mushroom House when moving behind the scenery; run along the ground.

Warp Whistle Two: Found in the World One Fortress. From the start, head right, avoiding obstacles until you reach an area with a Power-Up, a Dry Bones, and a door. Stomp the Dry Bones after collecting the Power-Up. You must have the Leaf power-up for the next step. Run right, past the door, to the wall. Quickly run back left to build speed so you can fly. Fly straight up off the screen, holding RIGHT, to go over the wall. Run right until you can't move further, then press UP to enter the door above. You will fall into a room with a small Treasure Chest containing the second Warp Whistle.

Warp Whistle Three: Located beyond the Dunes of World Two's desert. First, defeat the Wandering Boomerang Brother that carries the Hammer in a Treasure Chest. Move across the map to the top right screen and use the Hammer to break the rock to your right. Head east through the new path to find a Mushroom House (containing a Frog Suit). Continue to find a pair of Fiery Brothers. Defeat them to receive a Treasure Chest containing the third and final Warp Whistle.