| December 3, 2018 |
- Princess Peach
- Princess Daisy
- Professor E. Gadd
- Broque Monsieur
- Bowser Jr.
- Private Goomp
- Corporal Paraplonk
- Sergeant Guy
The overall gameplay is almost the same as previous entries of the franchise, though with two new characters in the story, Wario and Waluigi. As always, Mario and Luigi are controlled with the and buttons, while the new pair is controlled with and , respectively. Much like the brothers, Wario and Waluigi possess abilities used in the overworld for further exploration and advancement in the story.
The game takes place in both the Mushroom Kingdom and Sarasaland, meaning that there are two worlds to explore. Both duos can visit and explore the two Kingdoms, although there are areas only reachable by a specific pair.
To start a battle, Mario, Luigi, Wario or Waluigi must touch an enemy or perform a First Strike by jumping or hitting the enemy with their hammers/mallets in the overworld. Since the game is a turn-based RPG, the player and enemies take turns attacking each other. There are five attacks categories: Jump, Hammer/Mallet (Mario and Luigi or Wario and Waluigi, respectively), Bros/Duo Attacks (same as Hammer/Mallet), Item, and Flee. If the player loses a battle and tries again, the Hint option appears, which gives certain clues about the enemies' attacks and weakness. In addition, the Level-Up Roulette makes a return, allowing the option of raising specific stats after leveling-up.
Mario & Luigi's Battle System
As mentioned, Mario and Luigi can start a battle by jumping, striking or simply touching an enemy. The Bros. battle system remains almost untouched from previous titles. They must jump, hit and defeat enemies while avoiding the attacks of these through counter-attacks.
The badge system makes a return after its absence from Mario & Luigi: Paper Jam. It works identically as its predecessor in Mario & Luigi: Dream Team.
Wario & Waluigi's Battle System
The battles for the wacky duo are nearly identical to the Brothers'. However, there are some differences:
- Wario can only launch a single jump, unlike Mario, Luigi and Waluigi who can use a Double Jump while attacking. However, this jump results in Wario creating a shockwave which damages all enemies half the damage of the attack except airborne enemies. Additionally, if Wario attacks the aforementioned airborne enemies, the shockwave will not be created.
- Speaking of airborne enemies, thanks to his height, Waluigi has the ability of hit them with his mallet, an action otherwise impossible for Mario, Luigi and Wario.
- While jumping during a counterattack, Wario can inflate himself to flutter and stay longer in the air, much like Paper Mario from the previous entry.
- Like Wario, Waluigi has a new way to evade attacks. Sometimes, Waluigi must crouch to avoid certain attacks from enemies. This is possible by moving down the Circle Pad.
- During chase sequences in boss battles, Waluigi can use Wario to float and stay longer in the air, like the Aeroplane Guard in the previous entry. Likewise, Wario can compact Waluigi into a Boomerang to launch him toward bosses, like the Boomerang Guard.
Status effects can be caused by enemy attacks, items, badges, Bros/Duo Attacks, or the attributes of equipped gear. Some increase/decrease Mario, Luigi, Wario and Waluigi's stats and some them from attacking. Those which raise and lower stats will stack with all other status effects with the exception of raising a currently lowered stat (or vice versa). All of these effects can be cured with a Refreshing Herb.
|Burn||Player has fire on them; prevents them from attacking/dodging; loses partial HP every turn.||Mario; Luigi; Wario; Waluigi; Enemies|
|Poison||Player/enemy turns purple and loses partial HP every turn.||Mario; Luigi; Mario; Enemies|
|Sick||Player gets a runny nose and loses partial HP every turn.||Wario; Waluigi|
|Dizzy||Player cannot move from confusion and is unable to attack/dodge.||Mario; Luigi; Wario; Waluigi; Enemies|
|Trip||Player cannot react and is unable to attack/dodge. Entering battle when the enemy touches the rear of Mario, Luigi, Wario or Waluigi will automatically inflict to the victim this status.||Mario; Luigi; Wario; Waluigi|
|Fury||Player grows furious and increased damage dealt and received.||Wario; Waluigi|
|Power, Defense and Speed Up / Power, Defense and Speed Down.||Increases or decreases certain stats.||Mario; Luigi; Wario; Waluigi; Enemies|
Mario & Luigi's Badges
Wario & Luigi's Badges
Mario & Luigi's Ranks
- Mushroom Rank - Levels 1 to 5
- Shell Rank - Levels 6 to 11
- Boomerang Rank - Levels 12 to 18
- Flower Rank - Levels 19 to 26
- Leaf Rank - Levels 27 to 35
- Star Rank - Levels 36 to 45
- Rainbow Rank - Levels 46 to 100
Wario & Waluigi's Ranks
- Coin Rank - Levels 1 to 5
- Ball Rank - Levels 6 to 11
- Block Rank - Levels 12 to 18
- Racket Rank - Levels 19 to 26
- Garlic Rank - Levels 27 to 35
- Lightning Rank - Levels 36 to 45
- Storm Rank - Levels 46 to 100
This time, Special Attacks are divided in two categories: Bros Attacks (for Mario & Luigi), and Duo Attacks (for Wario & Waluigi).
3D Red Shell
|-||-||14||Hammer||Tatanga's Space Station|
|-||-||13||-||Tatanga's Space Station|
|-||-||15||Boots||Tatanga's Space Station|
The four heroes can use some techniques out of battle. All of the following techniques must be learned by progressing in the game, except for jumping.
|Technique||Button||Set Number||Description||Location Unlocked|
|Jump||1||Mario will jump. He can use this to make a starting attack and jump to places that can't be walked to. It is the most commonly used technique in the game.||Initially|
|Same as Mario's jump but for Luigi.|
|Hammer||2||Mario hammers whatever is in front of him. Can also be used to make starting attacks.||Flat Meadows|
|Mole Mario and Mini Mario||Luigi hammers Mario so he becomes squashed. Mario will then be able to go into smaller areas that can't be reached normally. If Luigi hammers Mario again he will return to normal size. If Mario is standing on softer ground, Luigi will hammer him into the ground so he can move underground. He can use this ability to dig up beans and other things. Pressing causes Mario to jump out of the ground.||Mushroom Grove|
|Pump Mario||Mario drinks from any fountain around. Luigi can strike Mario with his hammer so Mario spits the liquid, putting out fire or hitting certain targets with it.||Bowser's Castle|
|Spin Jump||3||Mario will jump on Luigi. Pressing A again will initiate the spin jump so Mario and Luigi can spin things and spin other to further away platforms. Press B when Mario is on top of Luigi to return to normal.||Easton Kingdom|
|Side Drill||Luigi will jump onto Mario's back; pressing the B button again launches the drill. It will drill whichever way Mario and Luigi are facing. Drilling can smash through rocks, and go into drill cannons that shoot out Mario and Luigi in different directions after Mario and Luigi have drilled in. Pressing the A button while Luigi is on Mario's back to returns them to normal.||Easton Ruins|
|Bros. Ball||4||Mario and Luigi will form a ball. In this form, they can roll and advance at much higher speed, and also pass over tight and narrow spaces. Pressing the B button while the ball is still returns them to normal.||Muda Kingdom|
|Side Drill||Mario and Luigi will jump into ball, which will endlessly jump until the player press B again. The jumps that the ball make are higher so the bros can reach higher places. Pressing the B button while the ball is bouncing returns them to normal.||Back Highlands|
|Technique||Button||Set Number||Description||Location Unlocked|
|Jump||1||Wario will jump. He can use this to make a starting attack and jump to places that can't be walked to. It is the most commonly used technique in the game.||Initially|
|Same as Wario's jump but for Waluigi.|
|Mallet||2||Wario hits whatever is in front of him. Can also be used to make starting attacks.||Birabuto Kingdom|
|Wario gets angry||Waluigi hits Wario with his mallet. Wario gets angry and kicks Waluigi in the leg.||Birabuto Kingdom|
|Waluigi Cake||3||Wario will jump on Waluigi, flattening him. Waluigi will take the duo's lead. In this form, Waluigi can enter small gaps on walls and float using strong wind currents. Waluigi will return to his normal form if Wario jumps on him again.||Birabuto Pyramid|
|High Jump||Waluigi can do a high jump by jumping on top of Wario and bouncing high. This is necessary to reach very high places.||Wet Wet Jungle|
|Waluigi Grab||4||Wario will take Waluigi from his legs and stretch his body. Wario can use him as a rubber band to grab out of reach objects. Pressing Y will return Waluigi to normal.||Tatanga's Factory|
|Wario Glide||Waluigi uses an air pump to inflate Wario. Waluigi will hold Wario's legs to use him as a balloon to reach far away places. Pressing X will return Wario to normal.||Chai Kingdom|
- Princess Peach's Castle
- Flat Meadows
- Mushroom Grove
- Wet Wet Jungle
- Chillwind Plains
- Back Highlands
- Bowser's Castle
- Bowser's Airship
- Birabuto Kingdom
- Easton Kingdom
- Muda Kingdom
- Chai Kingdom
- Tatanga's Space Station
* Mario and Luigi's Boss Battle.
** Wario and Waluigi's Boss Battle
*** Both pairs' Boss Battle.
Differences from other Mario & Luigi games
- A Wiggler isn't battled as a boss. This is lampshaded by one of the Wigglers living in Mushroom Grove