The third game on this site to get one.
Here is another quick walkthrough. Although this is only the third game to get one, this walkthrough is still quite important. Use it with a proper walkthrough like you did with the others.
Start the game
Beat Bowser in the first short battle. It's very hard to lose.
Collect any items in Toad square
Board the Bowser Cruiser
Work your way through the cruiser to above deck.
Defeat Fawful in the battle that follows
Beat the Hammer Bros rope jump mini-game
Collect 100 coins to get him out the cannon, also learning your first two special abilities.
Go through the next cave to Hoohoo mountain
Speak to hammer making guys and the construction workers to open the path
Go up the mountain to the statue
Beat the Hooros boss
Reach the summit
Speak to the hammer makers for free hammers
Break the block blocking the path off the mountain.
Go South to the Castle town
Enter the castle
Enter the sewers
Complete the sewers
Defeat the poisoned queen Bean
Agree to go to Chucklehuck woods
Go to this area
Enter the chateau
Clear the barrel maze
fight the bosses( Bowser and Popple)
Speak to the strange people who teach you your second set of special attacks.
Exit the house out the back door
Beat the forest maze
Fight the Chuckolator
Clear the cave as Luigi
Heal the queen when back at the castle
Go to Woohoo Hooniversity
Beat this dungeon
Navigate the basement
Beat Popple and Rookie, again
Get the Firebrand and Thunder hand abilities from the temples while at the oasis
Go back to shore via the sea bed
Go to the airport
Beat the Mom Piranha
Help Peach through Teehee valley
Win a special mushroom in the Little Fungi town casino
Navigate the ruins
Find the Beanstar pieces
Go back to the castle
Get to Joke's End
Go through Joke's End
Beat Jojora and friend
Get Beanstar out the Koopa Cruiser
Rescue Luigi as Mario
defeat Popple and Birdo
Get to Bowser's castle
Get through the place fighting the Koopalings and Fawful
Escape the castle
Watch the ending
Back to menu