New Super Mario Bros. U Deluxe

New Super Mario Bros. U Deluxe is a side-scrolling platform game released on the Nintendo Switch worldwide on January 11, 2019. It is a port of the 2012 Wii U launch title New Super Mario Bros. U. It contains both the base game and the New Super Luigi U DLC. Mario, Luigi, Yellow Toad, Blue Toad (both generically named Toad in this game), and Nabbit all return as playable characters from the original Wii U title while this game introduces a new playable character, Toadette, who makes her playable debut in the New Super Mario Bros. games and replaces Blue Toad in the story. She has a unique form known as Peachette, which she obtains after grabbing a new item called the Super Crown. The Peachette form grants her abilities similar but not identical to those of the Flying Squirrel form.

General

 * It is now possible to play as Luigi, Toad, Toadette, and Nabbit in single player in this game's version of the main mode of New Super Mario Bros. U, as well as this game's version of New Super Luigi U. The original release of New Super Mario Bros. U only allows single players to play as Mario in story mode, while the original release of New Super Luigi U restricts single players to Luigi, Nabbit (except in Flying Squirrel Ovation and Enemy Courses), and Mii characters (only in Flying Squirrel Ovation).
 * The game has a higher resolution, being displayed in native 1080p in TV mode, and 720p in Handheld and Tabletop modes, as opposed to the 720p resolution of the Wii U version.
 * New Super Mario Bros. U Deluxe is incompatible with Miiverse, as the service ended prior to the game's release and is not available for the Nintendo Switch.
 * Boost Mode challenges are removed due to Boost Mode being incompatible with the Nintendo Switch controls.
 * The game uses HD rumble, unlike the original game which uses simple rumble.

Character-specific

 * Toadette is added as a new playable character.
 * The Super Crown is added as a new power-up exclusively for Toadette. Toadette becomes Peachette after touching the Super Crown, which allows her to float and double jump, similar to the Flying Squirrel form (but with a more versatile aerial movement), and avoid falling into fatal objects. However, unlike the Flying Squirrel form, she cannot cling on to walls and she will not descend significantly when turning. Other characters cannot pick it up, merely passing through it without getting rewarded.
 * When playing as Toadette, all Blocks containing 1-Up Mushrooms instead contain 3-Up Moons. Only Toadette can hit blocks to reveal them in multiplayer.
 * Nabbit has been integrated into more aspects of the game.
 * Nabbit can now be played within the New Super Mario Bros. U levels.
 * Nabbit has new voice clips that are similar to the Toads.
 * Nabbit can bounce off Yoshis since he cannot ride them, unlike the original game where he simply goes through them.
 * Nabbit can now carry objects.
 * Toadette and Nabbit have altered abilities compared to the rest of the cast.
 * Toadette and Nabbit have swimming properties like the Penguin Suit, no matter what form they have.
 * Toadette and Nabbit are less slippery than Mario, Luigi, and Toad. Even while running, they will stop sooner and are less likely to fall into pits. They are also resistant to slipping on ice.
 * As a result, Toadette and Nabbit are not playable in Challenge Mode.
 * Yellow Toad and Blue Toad share a character slot, and are both referred to as simply "Toad". To switch between them, the player needs to hold while choosing said playable character.
 * This means two players cannot choose Yellow and Blue Toad simultaneously.
 * When playing as Luigi in New Super Mario Bros. U, a red-colored Super Guide Block appears and summons a computer-controlled Mario to clear the level in place of Luigi.
 * Playing as a Mii is no longer possible in Flying Squirrel Ovation within New Super Luigi U.
 * Both the New Super Mario Bros. U and the New Super Luigi U levels start with 100 additional seconds on the timer when playing as either Toadette or Nabbit, though no bigger time bonus is given when both of them are being played.

Gameplay

 * The jump controls are now shared with the mid-air spin, performed by pressing or  in mid-air. Players can still spin with the  and  buttons, however.
 * The player can disable the mid-air spin for or  by holding the  down for three seconds on the title screen while pressing the  and  buttons at the same time. When Nabbit's voice is heard, the jump controls have been disabled for the mid-air spin. However, this has to be done each time the game starts up.
 * Two buttons are now used to go in the bubble during multiplayer by holding down and  rather than one button, unlike the original Wii U game.
 * In the red Toad Houses with ? Blocks, Toad gives the player all of the items inside the blocks that were hit, instead of just one.
 * In the pause menu during levels, the controls for the and  buttons can be reversed; however, nothing else can be remapped.
 * On the pause screen, characters can be changed on the map screen.
 * A neon Nintendo Switch console appears in the Records Toad House, which plays a music box rendition of the game's credits theme while the credits roll.
 * The Records Toad House pages now resemble a map marked with a red stamp depicting a silhouette of Nabbit's ears. "Records" is now renamed to "Mario U Records" and "Luigi U Records" in the American English version, depending on the game being played. As Boost Mode has been removed, the records for "Distance on Boost Blocks" and "Distance on Mini Boost Blocks" have been replaced with "Times Companion Lifted" and "Synchronize Ground Pounds", respectively, along with updated icons.
 * In New Super Mario Bros. U Deluxe, the red Toad Houses with the shuffle mini-games have some items changed. Several Super Stars have been replaced by Super Crowns, while in New Super Luigi U, the 1-Up Mushrooms are now 3-Up Moons.
 * Enemy Courses now have a chance to hold a Super Crown, a Propeller Mushroom, or a Penguin Suit.
 * In New Super Mario Bros. U Deluxe, the stars on the player's profile will remain shiny, even if the player activated the Super Guide before.

Cutscenes

 * In both the ending and the cutscene where Peach is being rescued, Nabbit always appears in the background, regardless of what character(s) was/were used in the final boss battle.
 * Blue Toad is absent from the introduction and ending cutscenes, with Toadette appearing instead. Yellow Toad is the one who watches Bowser's and the Koopalings' escape in the ending (Blue Toad does this in the original versions).
 * Before fighting Bowser's final phase as Peachette, Peach notices Peachette from her tower looking confused just before the window slams shut.

UI and artwork

 * The buttons for Challenges, Boost Rush, and Coin Battle on the main menu have artwork of Mario thinking, Mario running, and a Star Coin, respectively, replacing the Super Mario Bros. sprites seen on the buttons in the original New Super Mario Bros. U.
 * Character selection icons now use their updated artwork. Toadette and Nabbit are also labeled as "Easier" and "Easiest" ("Easy" and "Very Easy" in the British English version) respectively.
 * The title screen uses the same ground as the New Super Luigi U title screen with Nabbit included.
 * The loading screen's background uses different 2D icons.
 * The challenges menu has been redesigned.
 * There is now a hint button on the menu.
 * When entering a world, the name of the map has a different banner design, with 2D artwork of blocks in outlines.
 * In this game's version of New Super Mario Bros. U, the button tabs on the map are red instead of blue. This game's versions of both New Super Mario Bros. U and New Super Luigi U use button icons of the Switch controllers. Additionally, the player can also use to open the menu.
 * Nabbit's icon marker on the map for chasing him has been updated.
 * In the Baby Yoshi minigame for the Power-Up Toad House, the Glowing Baby Yoshis' Toad icon has been updated to resemble Toad's 2D artwork from Super Mario 3D World, but with red spots.
 * When playing as Nabbit in single player, completed level spaces turn purple instead of blue. If the level is completed again with a character other than Nabbit, the space changes from purple to blue.
 * The movement instruction icons when using motion-controlled platforms have Joy-Con/Pro Controllers instead of Wii Remotes.
 * The Game Over and "Continues Used" screens are flatter.

Audio

 * The audio quality of the music has been increased; all tracks now have a sample rate of 48 kHz instead of 32 kHz.
 * In the second half of the athletic theme, the melody instrument is now stereo instead of mono.

Sound effects and voices

 * Bony Beetles now have sound effects when they stick out or retract their spikes.
 * Boom Boom and Boss Sumo Bro's voices sound slightly different.
 * The Super Guide Block's bell sounds different.
 * The Missile Bills, fired from Roy Koopa's cannon, have different beeping sounds.

Promotion
A browser game was released on the Play Nintendo website in 2019 called New Super Mario Bros. U Deluxe Power-Ups Trivia Quiz.

Critical reception
Similarly to the original New Super Mario Bros. U, New Super Mario Bros. U Deluxe has received generally positive reviews from critics.

Sales
By December 31, 2022, the game had sold 14.75 million units worldwide.

Pre-release and unused content
During the September 2018 Nintendo Direct, Mario was shown being used in Waddlewing Warning! and Larry's Trigger-Happy Castle, two New Super Luigi U levels. However, Mario is not playable in the New Super Luigi U levels in the final game, as is the case in the original New Super Luigi U.

References to other games

 * Mario Tennis Aces: Toadette's voice clips are reused from this game.

References in later games

 * Mario Kart Tour: Peachette and Penguin Toadette appear as playable characters, with the former reusing her artwork and her emblem being a Super Crown.