Mario & Luigi: Paper Jam

Mario & Luigi: Paper Jam (known as Mario & Luigi: Paper Jam Bros. in European languages) is an RPG game for the Nintendo 3DS which is a crossover between the Mario & Luigi and Paper Mario RPG subseries, as a result, it uses pre established characters and gameplay elements from both series. The plot revolves around Mario, Luigi, and Paper Mario trying to stop Bowser and Paper Bowser from taking over the Mushroom Kingdom using their combined armies after an accident involving the book containing the Paper Mario stories releases all contents from it. It is the second Mario & Luigi game for the Nintendo 3DS, the fifth game overall in the series, and the final original game in the series developed by AlphaDream. The game requires 3,444 blocks if downloaded from the eShop.

Gameplay
The gameplay stays similar enough to the previous instalments in the Mario & Luigi series, the main difference being the addition of Paper Mario and Party Members.

Overworld
In the overworld, players control Mario, Luigi, and Paper Mario simultaneously (Paper Mario using the Y button). Because the player now has two characters following after Mario, all three characters can be made to jump simultaneously with the X button, which also causes the three to flutter in the air briefly when held. By continuing to hold the button after jumping simultaneously, players can charge up a dash and run.

Party Members
Party Members are a new addition to the Mario & Luigi RPG formula, carried over from the Paper Mario series. At certain points in the story, characters who join the three core characters of Mario, Luigi and Paper Mario become temporary playable characters for a brief pocket of game time, (with the exception of Kersti and Paper Luigi). In the overworld, they're not playable and follow the trio around. In battle, they are controlled by the X button.

Battle System
Battles use a modified turn-based tactical RPG format. The Trio and the Party Member have the goal of defeating all enemy units present in a battle, by leaping between a series of towers. If the trio, or the enemies, enter an opposing tower, the overarching battle pauses as gameplay shifts down to a lower level, as in Mario & Luigi: Bowser's Inside Story. This is called a unit invasion, and it pits the playable characters present against the enemies within the tower, in a traditional Mario RPG gameplay setting. In this usual setting, players control all three members of the group along with the Party Member. Paper Mario, in a first for the series, fights alongside but independently from Mario and Luigi, unlike the Baby Bros. in Mario & Luigi: Partners in Time, and the Party Member stands beside Paper Mario on his left hand side. This allows the four characters to take four actions in one turn. While Mario and Luigi control similarly to the way they did in the previous instalments, Paper Mario's abilities set him apart from the other two. Paper Mario is able to create copies of himself as a battle command, which increase the damage he can do in his attacks: He can land as many jumps as he has copies, and when he uses his hammer, the copies will split and target all enemies on the field. Paper Mario loses a copy for each hit he takes, but can replenish them on his turn before using another battle command.

Each Party Member has one (or two) solo moves, which start out weak, but can be powered up using a battle command called "Charge". However with the exception of three party members, a lot of them are still weaker than the trio. They also don't have HP and are unusable for two or three turns, when they are "Injured" by an enemy.

Players are able to use Bros. Attacks with Mario and Luigi, working like they did in the previous games. In addition, a new variation of special attacks called Trio Attacks can be performed with Paper Mario. These attacks will have all three members attack enemies with a giant cardboard hammer to paperize them before executing the attacks. Party Members can also help in these special attacks in wingmen variations that can be toggled between two modes called, "Threeway" and "Fourway". "Threeway" only involving the trio, and "Fourway" involving the trio and the Party Member. "Fourway" costing more SP.

Both characters and towers are able to level up in the Mario & Luigi fashion, gaining boosts for each stat and the ability to choose one to boost further, with diminishing returns if selected repeatedly. When a tower levels up, its experience is converted into Star Points, the currency spent on skill tree upgrades. Ranking up increases the tower's stats and causes it to gain a new layer, often like a kinged checkers piece. The number of Star Points received in normal battles is always in three digits.

Boss Battles use a different system based on strategy and chase sequences. The Boss is pitted in a castle in the middle of the series of towers and it is the trio's job to get to the castle whilst trapping the boss in whatever chase sequence is initiated by the trio. The recommended way to stop a chase sequence being to reach the highest tower of the series of towers to trick the boss. Reaching the castle keeps the trio and the party member stagnant with the boss in the castle, following the same rules as normal battles. The number of Star Points received after beating a Boss is always in four digits

Bros. Attacks

 * Green Shell
 * Fire Flower
 * Rocket Blast
 * Drill Shell
 * Cannonball Chuck
 * Balloon Blast
 * Mega Thwonk
 * Red Shell
 * Star Top
 * Toad Trail

Trio Attacks

 * Racquet Rally
 * Kite Crash
 * Way-down Whirligig
 * Power Shuriken
 * Mighty Meteor
 * Showstopper
 * Screwdriver Diver
 * Ghost Jar
 * Airspring
 * Bob-omb Blast

Ranks

 * Mushroom Rank - Levels 1 to 5
 * Shell Rank - Levels 6 to 11
 * Flower Rank - Levels 12 to 18
 * Boomerang Rank - Levels 19 to 26
 * Leaf Rank - Levels 27 to 35
 * Star Rank - Levels 36 to 45
 * Rainbow Rank - Levels 46 to 100

Playable

 * Mario
 * Luigi
 * Paper Mario

Party Members

 * Kersti
 * Thoreau
 * Prince Peasley
 * Goombella
 * Lady Bow
 * Rawk Hawk
 * Paper Luigi
 * Wario
 * Waluigi
 * Kylie Koopa
 * Funky Vender
 * Piccolo

Supporting

 * Princess Peach
 * Paper Peach
 * Toads
 * Paper Toads
 * Toadette
 * Flutter
 * Starlow
 * Yoshis
 * Lakitu
 * Toadsworth
 * Paper Toadsworth
 * Dr. Toadley
 * Merlon
 * Toadbert
 * Toadiko
 * Professor E. Gadd
 * Elstar
 * Mamar
 * Skolar
 * Muskular
 * Misstar
 * Klevar
 * Kalmar
 * Twink
 * Mr Thwomp
 * Broque Monsieur
 * Broggy
 * Broque Madame
 * Blitties
 * Chakron

Antagonists

 * Kamek
 * Paper Kamek
 * Bowser
 * Paper Bowser
 * Bowser Jr.
 * Paper Bowser Jr.
 * Koopalings
 * Scaredy Rat Family
 * Nabbit
 * Paper Goomba Army
 * Crinkle Goomba
 * Midbus
 * Cackletta's Soul
 * Ice Sniffit Army
 * Skellobit Bloodline
 * Bonechill

Items

 * Beans
 * Coins
 * Mushrooms
 * Candy
 * Nut
 * Syrup Jars
 * Super Candy
 * Super Mushrooms
 * Supersyrup Jars
 * Ultra Candy
 * Ultra Mushrooms
 * Ultrasyrup Jars
 * Max Candy
 * Max Syrup Jars
 * Max Mushrooms
 * Refreshing Herbs
 * 1-Up Mushrooms
 * Double 1-Up Mushrooms
 * 1-Up DXs
 * Dash Socks
 * Boo Biscuit
 * Taunt Ball
 * Mystery Box

Objects

 * ? Block
 * Bomb Bud
 * Burner
 * Coin Block
 * Command Block
 * Copy Block
 * Dash Panel
 * Empty Block
 * Fire Bar
 * Fire Ore
 * Koopa Clown Car
 * L Block
 * M Block
 * P Block
 * Mushroom Book
 * Paper trampoline
 * Papercraft
 * Recovery Block
 * Red medallion
 * Rock Block
 * Spinny Flower
 * Warp Pipe
 * Save Block

Status Ailments

 * Trip
 * Poison
 * Dizzy
 * Burn
 * POW-Up
 * POW-Down
 * DEF-Up
 * DEF-Down
 * SPD-Up
 * SPD-Down
 * Fury (Bosses only)
 * Crumpled (Paper characters only)
 * Creased (Paper Mario only)

Locations

 * Peach's Castle
 * Sunbeam Plains
 * Gloomy Woods
 * Fungi Climb
 * Mount Brrr
 * Bowser's Stupid Villa
 * Star Shrine
 * Doop Doop Dunes
 * Doop Doop Dunes Grotto
 * Koopaseum
 * Twinsey Tropics
 * Twinsey Tropics Dungeon
 * The No Snake Hotel
 * Bowser's Castle

Lakitu Info Centers
The Lakitu Info Centers are a series a cloud-shaped buildings found in the game's locations except for Peach's Castle and Bowser's Castle. The player can talk to two Lakitus: the one on the right offers to play minigames, whose goals are catching Paper Toads. Catching Paper Toads rewards the player with Bean combinations and different Trio AttacksThe one on the left lets the player replay already cleared missions in their original format or in a harder format. By clearing a mission for the first time (Hard Mode included) the player can earn Medals. Obtaining a set number of Medals gives an exclusive Battle Card.

A pipe on the left of each building, which passage is freed once the player reaches the second Lakitu Center in Sunbeam Plains, leads to the Arcade. Here, the player can buy Lakitea for 20 Coins (which fully heals the party) and play in the Battlethon, and the Attackathlon, which, respectively, lets the player face harder variants of the game's bosses, and gives the player access to minigame variants of the special attacks that they have unlocked.

Battlethon Bosses

 * Petey Piranha
 * Smorg
 * The Koopa Bros
 * Wiggler and the Elite Trio
 * Bonechill
 * Tuntankoopa and Soul
 * Bowser Junior and Kamek Quartet
 * King Bob-omb
 * Reborn Elder Shrooboid
 * Dry Bowser

Attackathlon Special Attacks

 * Racquet Rally
 * Green Shell
 * Cannonball Chuck
 * Balloon Blast
 * Way-down Whirligig
 * Power Shuriken
 * Bob-omb Blast
 * Toad Trail
 * Mega Thwonk

Yoshi Races
Seven colored Yoshis are founded in the locations, Sunbeam Plains (green), Doop Doop Dunes (Yellow), Twinsey Tropics (Blue), Gloomy Woods (Red), Fungi Climb (Purple), Mount Brr (Pink) and Bowser's Castle (Orange). These Yoshis challenge the trio to a race. When winning a race, the Yoshi gives the trio a fruit that can be exchanged for a rare bean combination that adds three points to a characters' stats.

Toad Quiz
Five Toad scholars, found in Sunbeam Plains, Doop Doop Dunes, Twinsey Tropics, Gloomy Woods, and Mount Brrr, host quizzes with trivial questions mainly about the game's story and characters. To earn a one-time prize (3 Beans of a certain kind), the player must answer 3 questions out of 5 correctly under ten seconds. If the player keeps giving right answers, they will also gain some Coins. The questions are picked randomly from a pool and their wrong answers may vary.