Dr. Mario World

Dr. Mario World is a game in the Dr. Mario series for and  smartphones. The game was originally set to release on July 10, 2019, but ended up being released a day earlier on July 9. It is a free to download game with optional in-app purchases that is being co-developed by Nintendo, LINE, and, and was available initially in 59 countries/regions including Japan and the United States. The game supports multiple languages including Japanese and English. Dr. Mario World is the second Mario game for mobile devices, following Super Mario Run. Pre-registration for the game opened on July 1.

Gameplay
As with previous Dr. Mario games, the player's objective is to eliminate all of the viruses on the screen by connecting capsules of the same color to each of them, although instead of the capsules descending, the game's gravity is directed upwards with the viruses positioned towards the top of the screen. The player first drags a capsule from the bottom of the screen onto the field to use it, and can drag it again to move it or increase its "falling" speed, or tap it to rotate it horizontally or vertically. Viruses are eliminated if three (as opposed to four) or more of the same color are matched. The classic red, blue, and yellow viruses return, while new green, purple, cyan, and pink viruses make their debut.

Depending on the level, various obstacles may appear on the field, including Empty Blocks and Brick Blocks. Different-colored shells and bombs can also appear among the viruses which, when matched with capsules of the same color, clear out viruses on the same row and eliminate surrounding viruses, respectively. Some viruses are encased in bubbles, which shield them from capsules once before they disappear; or trapped in cages, only being released after clearing a lock on the field.

Levels are grouped into worlds, beginning with five – a grass-themed world, a desert-themed world, a beach-themed world, a ghost-themed world, and a sky-themed world – with more to be added in the future.

In order to play a level, the player needs to have at least one heart. Hearts are gained automatically as time passes, although players can purchase hearts with diamonds. Diamonds can also be used to obtain items and to continue a level should a player fail an attempt (although only one continue is allowed per attempt). Diamonds can be purchased through the app with real money.

Unlike prior Dr. Mario games, players are limited to a certain amount of capsules per level.

Doctors
Each playable character offers a unique special skill that can be activated during gameplay.
 * Dr. Mario
 * Dr. Bowser
 * Dr. Peach
 * Dr. Luigi
 * Dr. Yoshi
 * Dr. Toad
 * Dr. Toadette
 * Dr. Bowser Jr.
 * Dr. Wendy
 * Dr. Ludwig

More doctors are planned to be added via software updates. Potential future doctors have their graphics extracted from the game; this includes Daisy, Wario, Waluigi, Rosalina, Donkey Kong, Diddy Kong, Luma, Baby Mario, Baby Luigi, Baby Peach, and Baby Daisy.

Assistants
Assistants, like the doctors, have unique skills that aid the player. Up to two assistants can be selected at once.
 * Goomba
 * Koopa Troopa
 * Shy Guy
 * Piranha Plant
 * Pokey
 * Spike
 * Hammer Bro
 * Cheep Cheep
 * Spiny Cheep Cheep
 * Blooper
 * Koopa Paratroopa
 * Lakitu
 * Spiny
 * Paragoomba
 * Swoop
 * Bob-omb
 * Huckit Crab
 * Bullet Bill
 * Peepa
 * Scaredy Rat
 * Sumo Bro
 * Porcupuffer
 * Buzzy Beetle
 * Amp
 * Boom Boom
 * Pom Pom
 * Clampy
 * Para-Beetle
 * Crowber
 * Sledge Bro
 * Banzai Bill (only obtained from battle boxes in versus mode)
 * King Bob-omb (only obtained from battle boxes in versus mode)

Virus Vid


To promote Dr. Mario World, Nintendo released a series of short videos on social media featuring the viruses performing various activities, beginning on June 18, 2019, on a daily basis.

References to other games

 * Super Mario series: This game's five worlds are commonly featured across the Super Mario platformers.
 * Tetris & Dr. Mario: The music heard during Dr. Toad's first gameplay tutorial is an arrangement of Music 1 from the Mixed Match mode from this game.
 * Super Mario Odyssey: Dr. Bowser's attire is similar to his normal self's wedding attire in this game.