Super Paper Mario/Chapter 1: Lineland

Heart Pillar 1
After the cutscene, answer yes to Merlon's question to get the Red Pure Heart then fall off to the left.
 * Flipside Tower

Go left and place the Red Pure Heart in the Heart Pillar. Go down the elevator on the right.
 * Flipside 3rd Floor

Go left. Save. Go up the tower-like looking elevator.
 * Flipside 2nd Floor

After Merlon gives you the Return Pipe, go through the red door.
 * Flipside Tower

Chapter 1-1: The Adventure Unfolds
Enemies: Get it? Unfolds? Paper? Ha ha. Yeah. Anyway, just move far to the right side of this screen, jumping on the enemies to kill them. In the house there, use Tippi to reveal a hidden door. You'll meet Bestovious, who will teach you how to flip to 3D for 10,000 coins. Decline twice to make him teach it to you for free! Now flip to 3D (Press the A button as Mario). When you do, a meter will appear at the top of the screen. If it runs out, you'll lose 1 HP, so be careful!
 * Goomba - Max HP:1, Attack:1, Defense:0
 * Squiglet - Max HP:2, Attack:1, Defense:0
 * Squig - Max HP:4, Attack:1, Defence:0
 * Sproing-Oing - Max HP:4, Attack:1, Defense:0

Go back outside, then flip near the door surrounded by blocks in order to get into it. In the next area, continue going right and flip near the green pipe to pass it. When you get to a giant gap, flip again and walk on the path to the left.

When you get to a large wall that seems impossible to pass, flip and keep going. In the next area (yup, another one), hit the ? block to get a Mega Star that makes you...MEGA MARIO!! You can kill any enemies and break bricks by touching them. When your power runs out, you'll find a Star Block, which you can hit to end this chapter.

Chapter 1-2: Afoot in the Foothills
Enemies: You'll now have to cross Mount Lineland to get to Yold Town, which leads to the Pure Heart. Jump on the Koopa Troopas at the beginning to knock them into their shells, then kick them to get points and crash into other foes. Climb the ledges until you get to large, moving rectangle. By standing in the red square near them, these rectangles will scoop you up and take you to the other side of the area. Run right to find a switch; activate it in 3D to raise ledges leading to more rectangles. Ride them and go through the door.
 * Koopa Troopa - Max HP:1, Attack:1, Defense:1
 * Paratroopa - Max HP:1, Attack:1, Defense:1
 * Spiky Tromp - Attack:1 (Cannot be defeated)

Keep going right until you seem to reach a dead end, then flip into 3D to find some blocks you can use as steps. Do the same for the next set. Defeat the Koopas here, and proceed towards the incline. Some Spiky Tromps are rolling down it. They are nearly impossible to jump over, so use 3D and go through the door. You'll find a large gap that you cannot jump across. Go into the nearby pipe and go into the house. Go up the stairs and flip into 3D to find Red, who will put down the bridge for you. Continue across the bridge to Yold Town.

If you want to, you can talk to the people here or visit another one of Howzit's shops. When you're ready to continue, go to the mayor's house on the far right to hear that if you are rally the hero, you must have a Pixl shaped like a hand. To find it, enter the house to the left of the mayor's (whose name is Watchitt), flip, and enter the pipe behind the books. To avoid the Thwomps, flip again and go through the door. You'll come to a seemingly empty room, but wait! Use Tippi to find a hidden door. Here, you'll find the Pixl Watchitt was talking about, Thoreau, but you'll be become locked in the room where you found him. To get out, grab the nearby block with Thoreau by pressing the 1 button, then jump and press it again near the switch. Return to Watchitt, who will tell the bridge...guy to put down the bridge. Go to his house by using the pipe near Watchitt's. Talk to him (his name's Green, by the way) and you'll be able to cross to the Star Block.

Chapter 1-3: The Sands of Yold
Enemies: Boss: When you arrive in Yold desert, walk to the right until you get to a red palm tree. If you want to skip part of this chapter, jump while standing under it ten times to make a door appear, then go through it. Go right and flip into 3D to get across the sand. Then flip 3D again to get across the brown bricks. Save. Enter the door.
 * Squiglet - Max HP:2, Attack:1, Defense:0
 * Squig - Max HP:4, Attack:1,Defense:0
 * Boomboxer - Max HP:4, Attack:2, Defense:0
 * Jawbus - Max HP: 5, Attack:1, Defense:0
 * Goomba - Max HP: 1, Attack:1, Defense:0
 * Bald Cleft - Max HP:2, Attack:1, Defense:2
 * Cherbil - Max HP:5, Attack:2, Defense:0
 * Ice Cherbil - Max HP:5, Attack:2, Defense:0
 * O'Chunks - Max HP: 20, Attack:1, Defense:0

Boss fight: O'Chunks

Chapter 1-4: Monster of the Ruins
Enemies:
 * Squiglet - Max HP:2, Attack:1, Defense:0
 * Buzzy Beetle - Max HP:1, Attack:1, Defense:3
 * Spiky Tromp - Attack:1 (Cannot be defeated)

Boss:
 * Fracktail - Max HP:18, Attack:1, Defense:0

Go down the stairs and the door. Jump over the sand and 3D to avoid the flames. Jump right. Go down for A Life Shroom. Back to the item brick and go through the door. More flame wheels. At the end of the hall find and hit some bricks in 3D. Enter the door that appears. 3D for the tromps, climb the ladder and open the chest. Backtrack to the locked door. Save. More Tromps so just 3D them again and jump on the item brick then enter the door. Fall down to the right, throw the enemies to the switch, climb up the ladder and through the door. Backtrack to the sand pit and grab the key with Thoreau. Go back right and unlock the door.

Go down the stairs and use Tippi to find A ledge under the door and enter it by jumping off the stairs. Flip to 3D below the key and go through the passage in the wall to get the key. Use the spring to the left and continue. Flip to 3D to find A ladder. Hit the blue block and step on the red panel.

Go through the door. Flip into 3D and hit the blocks in order. Grab the Super Shroom, Save and enter the pipe.

Boss fight: Fracktail

After that, go through the door. You will get the Orange Pure Heart.