| Location | Description | Sticker Found |
| World 1-1 | Right after you fight Bowser Jr., the next area has a secret door on one of the hills near the southeast in the lower area. | Thumbtack |
| World 1-2 | Found near the end of the course. When you find the Comet Piece, go to the south side of the ledge. You'll find this secret door in the foothills next to a Jump sticker. | Flashy Fire Flower, Flashy Ice Flower, Flashy POW Block |
| World 1-3 | After you drain the water with a Faucet, you can jump into the hole below the Bowser fountain, outside to the south. The secret door should be immediately in front of you. | 35 Coins, Bed |
| World 1-4 | Near the end of the Course with the Comet Piece, in the hidden garden near the northwest corner, hides this secret door. | Matches Thing |
| World 1-5 | This secre tdoor is in the underground passage, which can be reached by either opening the pipe at the beginning of the level or finding the alternate entrance. The door is in the middle of the cave. | Bellows |
| World 1-6 | In this level, there will be giant fans you need to block with Stickers. If you fall off the bridge and head right, near the middle of the eastern wall, you'll find this secret door. | Squirt Gun |
| World 2-1 | The top of the back side of the pyramid, where the secret door hides, is accessible near the end of the level. | Car Battery |
| World 2-2 | Once you find the Sphinx after exiting the pipe, go the north edge of the Sphinx on the other side, to find this secret door. | Paper Fan |
| World 2-3 | If you take the right slide three times, you'll find this secret door easily. Can be reached through Door 4 or Door 5. | Lighter |
| World 2-4 | It's on the outer ring, near the path to the oasis. Head west once you enter this world and you'll find it soon enough. | Hair Shears |
| World 2-5 | Also easy to spot. Just go north a few steps after entering the level. | Flashy Eekhammer, Flashy Spike Helmet, Flashy Hurlhammer Sticker |
| World 3-1 | In the area with several large poison lakes, north of the middle ledge, there is a tree among the flooded platforms nearby this secret door's entrance. | Searchlight |
| World 3-2 | In the maze, go northeast, northwest, then northeast two times. The secret door is at the southeastern area near the steps. | Violin |
| World 3-3 | The first room of Wiggler's treehouse should be a living room. At the top of the ramp on the upper floor is this secret door. | HP-Up Heart |
| World 3-4 | Near the area with the first Comet Piece is a ledge near the south that can be jumped over. The secret door rests here. | Drum |
| World 3-5 | Close to the Bomerang Bro there is a cave to the south. In the northern portion of the tunnel is this secret door. | Pillow |
| World 3-6 | The first area has a Sticker Shop. Right below in the southeast area is this secret door. | Fishhook |
| World 3-7 | The location of this secret door is behind the Hammer, on the ledge in the burrow's first chamber. Alternately, you can simply go south and west of the boss room and walk along the norther wall to find the door's entrance. | Upright Vacuum, Coins |
| World 3-8 | It's right there in the Course entrance. | Tape, Coins |
| World 3-9 | In the second area, there are two trees with health pickups. Go between them and head north. It's beside the second pool, below the poison gas. | Burnhammer, Baahammer, Chillhammer, Shiny Fire Flower, Shiny Ice Flower, Shiny POW Block Sticker |
| World 3-10 | Reveal this secret door in the storage room by finishing the special portion of the quiz show. | Square Can, Coins |
| World 3-11 | Near the center of the foothills in the top northwest corner is this secret door. | Balloon, Coins |
| World 3-12 | Immediately upon arriving on the island, head west to discover this secret door waiting. | Newspaper |
| World 4-1 | This door is hidden under the central slope. You'll need to use the Radiator Sticker at the top-right portion of the area and find the door in the southwest area. | Cell Phone |
| World 4-2 | After crossing the waterfall, go onto the two ledges and fall to the south to find the door. | Hair Dryer |
| World 4-3 | From the lobby, got east, north, and then north again. This brings you to a room with a big staircase with the secret door nearby, which brings you to Decalburg. | Shortcut to Decalburg |
| World 4-5 | This door is right near the Ice Bro, on the mountain path below the icicles. | Flashlight |
| World 4-6 | Enter the right entrance and you'll find this Secret Door, which is just a shortcut to the front of the ride. | No reward, really |
| World 5-1 | After chasing down the Spear Guy to get the Bridge Part Scrap, this door is right on the platform with the scrap. | Tailor Shears |
| World 5-2 | Right near the boathouse, directly east from entering the area. | Mini Vacuum |
| World 5-3 | At the end of the river is a Comet Piece. Go west and the door is etched on the wall. | Luxurious Bed |
| World 5-4 | Ride the rotating blades partway to find this door on a second-floor platform. | Air Conditioner |
| World 5-5 | This door is within the large lava pool. Reach it by freezing the entire area. | Basin |
| World 5-6 | Return to this world after saving Kersti. Enter the pipe at the start, go to the elevator, ride it twice, and go west to the door. It should be on the fifth floor. | Guitar |
| World 6-2 | Right inside the ship's cabin in the first room is this final secret door. | Shiny Line Jump, Shiny POW Block, Shiny Hurlhammer, Megaflash Jump Sticker |
