Booster Pass
As soon as you enter the area, go to the back left corner to find a Hidden Treasure up on a big square ledge. Stand on the plant to reach it.
Head to ward the exit in the top right. Before exiting, there is a Hidden Treasure on the corner of the path that leads out.
Get the Hidden Treasure and then exit the area.
In the next area, go around to the right side.
If you enter the cutout in the wall on the right, there is a hidden merchant you can speak to.
He’ll give you Thought Peek.
While you’re in the same cutout as the hidden NPC, go the end of it and jump. There is a hidden switch that will kill all of the enemies above you.
With all that done, get up on the cliff and head for the exit through the stone structure.
Booster Tower
As soon as you enter the area, you’ll see Bowser.
After the scene, interact with the door. It’ll be locked, but Bowser will return to push it open.
Bowser will now join your party.
Enter the door and then head up the stairs on the left and into the open doorway on the top floor.
Climb up the stairs and then jump up to reveal a Hidden Treasure near where the Snifsters are spawning.
Go through the doorway where the Snifsters are spawning.
You’ll see a scene with Booster in a train in the next area.
After the scene, go to the right side to find a hidden flower tab in between a stack of big crates and the wall.
Take the exit near the hidden flower tab and climb up the stairs.
Take the first exit at the top and you’ll see a chest.
The chest has the Masher weapon for Mario in it.
In order to get it, you’re going to need to jump off the ledge and fall all the way down to the bottom. You need to land on a catapult in order to be shot all the way back up.
Once you’re back at the top, go through the second entrance this time and jump on the switch. This is something that’ll come in handy later.
Take the exit.
Go behind the curtains for quick change if you’d like and then continue when ready.
Climb all the way up and save at the eventual save block.
Booster Tower Painting Puzzle
There will be a puzzle in the next room involving the paintings on the wall.
Interact with the paintings in the numerical order pictured below.
Upon completing the puzzle, you’ll be given the Elder Key.
Open the door to the left of the paintings and enter the room to find a new weapon (Chain Chomp) for Bowser.
Return to the painting hallway and take the exit at the end of the paintings.
Get the mushroom from the chest on the right side of the top floor and then jump on the catapult to be shot all the way up.
Before climbing up, jump up the bottom left corner to reveal another Hidden Treasure.
Climb up.
Before going up the steps at the top left, go into the cutout and jump up to find a frog coin.
Afterwards, continue climbing up and enter the doorway.
The next room is sort of a big puzzle.
Stepping on the wrong tile will trigger a battle. You can grind some experience here if needed. You’ll be able to double your EXP in this room after battles as well.
Try to follow the tiles with coins and collect everything in this room. The coins, frog coins and key.
After you get the key, open the locked door in the room and you can find the Zoom Shoes.
Take the exit and climb up the stairs to the next room.
As soon as you step into the next room, Booster will start throwing bob-ombs at you, so quickly take the exit in the bottom of the screen.
Climb the next stairs and save at the next save block.
Climb up the yellow steps and get the chest to find a frog coin.
Get back on the yellow platform and then jump on top of the chest you just opened. Jump up to find another Hidden Treasure.
From there, go to the lowest yellow platform to find another Hidden Treasure.
After collecting all of that, it’s time to exit the room.
You’ll find Peach, but will be unable to get to her.
After that scene, you’ll have to hide in the curtains.
When Booster’s minions go to open the curtain, run and hide behind the one that isn’t opened.
If you can make it through without being spotted, you’ll be given the Booster Charm. If you’re spotted, you’ll have to fight Booster.
When all of the curtains are opened, go and jump up to knock down the Mario doll.
Save and heal up if you need to and then go out where Peach was and it’ll be time for a boss fight.
If you got Booster’s Charm, go ahead and equip it for this fight.
Knife Guy / Grate Guy
For this fight, you’re going to want to make sure you have Bowser in your party equipped with the Chain Chomp we picked up earlier. Use Geno as well.
All of your physical attacks will be effective against them. Focus all your attacks on Knife Guy until he goes down and then go after Grate Guy.
After the fight, you’ll jump down from the tower and will need chase Booster up the hill.
All you have to do here is run up the hill jumping over and avoiding any obstacles that get in your way. Try to get as close to Peach as you can and she’ll give you flowers.
If you land on an enemy or barrel, you’ll sprint forward.
At the top, you’ll be at Marrymore.
Before heading into Marrymore, exit from where you just entered and head back to Booster Pass.
Once there, back track to the mine entrance. This is where we opened a Hidden Treasure earlier.
Enter the mine and cross the walkway all the way over to the end and opened the three chests. These are a result of stepping on the switch in the tower earlier.
With all of that collected, return to Marrymore.
Marrymore
As you enter, you can find a group of toads in town. Speak with them to progress the story.
Afterwards, go to the inn.
Go up the stairs and enter the doors on the right.
Jump up onto the bookshelf in the left corner to reveal a Hidden Treasure.
Buy any gear you may want or need and save your game.
When you’re ready, head to the church from the scene earlier.
Go around to the right side of the church and enter through a hidden door.
Continue through the church until a Snifster finds you.
After the conversation, he’ll ask you for help breaking down the door.
Run into the door at the same time that he hits it to open it.
The next door will be locked, but Bowser will help you open it.
In the next room, you’ll need to quickly interact with each of the Snifsters in order to get Peach’s items back. Her crown is on Booster’s head. Jump on him to get it.
After you have everything, speak to Booster.
After the conversation, it’ll be time for a boss battle.
Bundt
During the fight, focus your attacks on the cake. Just keep attacking it until Booster appears.
After the fight, Peach will join your party. Exit the church and Marrymore. You’ll be automatically taken back to Mushroom Kingdom.
Go to the castle throne room.
A long scene will play. After its all over, exit the castle. Peach will re-join your party and it’ll be time to head for Tadpole Pond.
Go to Tadpole Pond and speak to the Frog Sage.
He’ll direct you to your next destination, Star Hill.
Star Hill
As you enter, interact with the star plant next to the second door to open it.
Interact with all five plants in order to unlock the door.
Go through the door and activate the star plants again.
Go through the next door and go to the north side of the room to find the Star Piece.
After collecting it, activate the plants again and then head through the door and go to Seaside Town.
Had kinda hoped that Luigi would be a party member in the remake, he’s in the instruction manual for the og Mario RPG on SNES and in photos from the beta.