If you paperize the area around a circle of flippable flowers, you will see a stickable area appear. Stick a sticker and a "?" block will appear. Inside the block will be a more powerful version of the sticker you originally stuck.
Easy Flashy Fire/Ice Flowers and Coins (Exploit)
Obtain three flasy fire/ice flowers and make your way to World 1-2. Grab the fan and find the area where the Toad is crying. Paperize the flowers and place them on the field where indicated to receive twice the number of flowers. Now you can sell the duplicates and also the fan, then repeat the process as often as you like for easy flashy fire/ice flowers and coins.
Enemy Exhibition Room
Collect all 96 battle stickers.
Enemy Viewing Area
Once you place all of the Battle Stickers in the museum, a new door appears. Pass through it and you'll find that if you pay a single coin, you get to see enemies attacking a cutout of Mario. Various animations will display as those enemies attack.
Finding Luigi
If you find Luigi five times while playing through the game, he'll appear at the start of the end credits, holding the banner. The locations where you can find Luigi are as follows.
Location
Description
Drybake Stadium
Near the top of the tower on the outside, in the window.
Goomba Fortress
At the second bridge in the middle of the level.
Rugged Road
In the spa area.
Whitecap Beach
At the very end of the dock you can see him in the distance.
Whiteout Valley
Visible as you are going up the ski lift.
Hidden Song at Game's End
After beating the game (and watching the credits), the screen will shift to the book from the start of the game. The book closes and the light turns off. At this point, just wait about three minutes. A hidden lullaby song will start to play, and will continue to play until you hit a button.
HP-Up Heart Locations
This has the locations of all 16 HP-Up Hearts. Each HP-Up Heart increases Mario's HP by 5.
Unlockable
How to unlock
HP-Up Heart 1
In Surfshine Harbor, Fix the sideways door and enter it, then go around to the other side and climb the crates to the second floor.
HP-Up Heart 2
In Bouquet Gardens, Place Flower Stickers in the Toad's destroyed garden after you got the Fan.
HP-Up Heart 3
In Hither Thither Hill, Defeat the Big Buzzy Beatle.
HP-Up Heart 4
In Drybake Desert, At the Pyramid.
HP-Up Heart 5
In the Yoshi Sphinx, At the Comet Piece walk opposite of the stairs you climbed to slide off of the other side of the Sphinx to reach the HP-Up Heart.
HP-Up Heart 6
In Sandshifter Ruins, Inside of a Coffin in one of the many doors inside the ruins.
HP-Up Heart 7
In Wiggler's House, Use a door sticker to enter the secret area with the HP-Up Heart in it.
HP-Up Heart 8
In Gauntlet Pond, In the area with the Super Star. Easier to find entrance to the secret area after the poison is gone.
HP-Up Heart 9
In Treebranch Trail, Secret area in the first tree in the second area, the entrance is across the poison on the right side of the tree.
HP-Up Heart 10
In Leaflitter Path, Nearby the Comet Piece after the Poison is gone.
HP-Up Heart 11
In Stump Glade, Beat Snifit or Whiffit again after getting the Royal Sticker and removing the Poison.
HP-Up Heart 12
At Ice Flow, on a ledge at the second ice path.
HP-Up Heart 13
In the Enigmansion, after completing Whitevaley Lift, go back to the Enigmansion and go to the living room. The Lift Operator is the master again and the old master you helped is a butler again. Sit in the chair and the butler comes in, serves you and gives you the HP-Up Heart.
HP-Up Heart 14
In Shy Guy Jungle, When going after the Spear Guy that ran off with the scrap to the right, go behind the first giant flower and head right, enter the Hidden area to find the HP-Up Heart.
HP-Up Heart 15
In Rumble Volcano, It is nearby where Petey Piranha is sleeping.
HP-Up Heart 16
In Decalburg. After saving the traveling Toad in all five Worlds, Read the last postcard in his house and his friend will give you the HP-Up Heart.
Luigi Locations
In the background of certain levels, you can spot Mario's brother Luigi, who can be peeled off the level by Paperizing. If you peel him off in all 5 locations, he'll appear during the credits sequence. In addition, each individual peeling will unlock a rather amusing newspaper article in the leftmost house in Decalburg's Residential Area.
Location
How to unlock
Luigi Location
World 3-12: On a rock formation sticking out of the ocean in the background that's only visible from the pier.
Luigi Location
World 4-5: Near the end of the chairlift after the enemies stop coming. You only have so much time, so be quick.
Luigi Location
World 5-5: In the background to the left of the hot springs.
Luigi Location
World 2-5: On the fourth floor of the tower, in a window on the far right end of the second outdoor walkway.
Luigi Location
World 1-6: On the bridge leading to the central tower, look in the backgrond.
Megaflash Sticker Locations
Megaflash Stickers are the rarest and most powerful battle stickers in the game, but each one will only ever appear in one set location, (except the Megaflash Hurlhammer, which appears in two) and some can be very tricky to find. However, once you know where to find one, you can get as many as you want, so it helps to know where they all are.
Item
Location
Megaflash Baahammer
World 5-4: On the third floor, through a warp pipe hidden to the right of the moving platforms in the main room.
Megaflash Burnhammer
World 5-5: In the first area, in a secret room behind a rock near the entrance to the second area.
Megaflash Chillhammer
World 4-6: On a platform in the second minecart area that requires you to Paperize the rail to reach.
Megaflash Clone Jump
World 5-6: On the third floor, pound the stake furthest to the right.
Megaflash Eekhammer
World 5-4: At the beginning of the level, release the raft by hitting the stake with the hammer, then ride it to the right.
Megaflash Hammer
World 2-2: Behind a secret panel below the balcony in the room with the Hammer Bros.
Megaflash Hopslipper
World 5-4: In the same room as the Megaflash Baahammer and Megaflash Hurlhammer.
Megaflash Hurlhammer
World 5-1: Behind the Hammer Bro in the area with the second red flower.
Megaflash Hurlhammer (2nd location)
World 5-4: In the same room as the Megaflash Baahammer.
Megaflash Infinijump
World 5-3: In a secret area to the right of the pillars in the room with the Comet Piece that's accesible from the "loop" in the river.
Megaflash Iron Jump
World 5-5: In the fifth area, under the "X" at the top of the hill. Stand on it until you see a shadow, then move out of the way.
Megaflash Jump
World 6-2: Through the Secret Door, in the ship's cabin.
Megaflash Line Jump
World 4-6: On a ledge below and to the right of where you fight the boss. Return after getting the Royal Sticker.
Megaflash Slaphammer
World 5-5: In the fourth area, under the "X" on the ground closest to the entrance. Stand on it until you see a shadow, then move out of the way.
Music Exhibition Room
Collect all 64 thing stickers.
Royal Stickers
You can earn Royal Stickers by defeating the bosses listed below in the levels indicated.
Level
Sticker
1-6
Megasparkle Goomba
2-5
Tower Power Pokey
3-12
Gooper Blooper
4-6
Bowser Snow Statue
5-6
Petey Piranha
6-3
Bowser
Sound Test
Place all 64 stickers in the museum to unlock the game's Sound Test mode.
Super Flag Achievements
There are eight Achievements you can achieve in this game. They can be achieved at any time, and through a number of conditions. However, it is worth noting that, after completing World 1-6 and getting the first Royal Sticker, there are eight Super Flags in the Sticker Fest area of Decalburg. You can examine them to check on your progress to the Achievements.
Achievement
How to unlock
Super Flag Achievement
Find every single HP-Up Heart.
Super Flag Achievement
Collect every sticker type in the world.
Super Flag Achievement
Make all of the secret doors appear.
Super Flag Achievement
Collect all of the Comet Pieces.
Super Flag Achievement
Spend 10,000 or more Coins at shops.
Super Flag Achievement
Get a Perfect Bonus (win without getting hit) in 500 or more battles.
Super Flag Achievement
Perform 1,000 or more "Excellent" Action Commands in battle.
Super Flag Achievement
Get three symbols matched on the Battle Spinner slots 50 times.
