World 5 (Dr. Mario World)

World 5 is a cloud-themed world in Dr. Mario World. It is available since the initial version of this game.

When an area is cleared, Spinies, Paratroopas, and Lakitus appear. The viruses featured in the regular stages are red, yellow and blue.

Area 1

Image	Stage	Best Doctors	Overview
	Stage 161	Dr. Baby Luigi Dr. Baby Mario	This stage introduces clouds, which shroud objects behind it and will temporarily become transparent as to reveal its contents. Any object behind a cloud behaves normally, but destroying that object will cause the cloud to disappear. The objective of this stage is to eliminate all viruses. In this stage, there are two groups of eight viruses shrouded in clouds above two rows consisting of Brick Blocks and viruses.
	Stage 162	Dr. Luigi Dr. Kamek	The objective of this stage is to eliminate all viruses. The upper portion of this stage is shaped like a fish formed by viruses that include normal ones, half-frozen ones and clouded ones. The lower portion of this stage contains viruses inside bubbles. Both portions have Brick Blocks.
	Stage 163	Dr. Yoshi Dr. Peach	The objective of this stage is to eliminate all viruses. In this stage, clouded viruses are located at the topmost row, leftmost column and rightmost column. In the middle, an exploder is surrounded by Brick Blocks containing hidden viruses and a skill charger surrounded by dust viruses.
	Stage 164	Dr. Fire Mario Dr. Ludwig	The objective of this stage is to eliminate all viruses. In this stage, there are three portions separated by three Empty Blocks between Brick Blocks. The middle portion has two groups of fully-frozen viruses surrounding Brick Blocks between a group of viruses in a "+" shape. The top portion contains two rows of viruses containing three in the middle at the top and a full row at the bottom, while the bottom portion contains a row of viruses.
	Stage 165	Dr. Diddy Kong Dr. Wendy	The objective of this stage is to collect all coins from Coin Blocks. In this stage, there are four rows of seven Brick Blocks, and between each of them are viruses in the odd-numbered columns. The topmost row has viruses in the leftmost, center and rightmost sides. The Brick Blocks that contain coins are the even-numbered columns for the first and third rows and the odd-numbered columns for the second and fourth rows.
	Stage 166	Dr. Bowser Jr. Dr. Waluigi	The objective of this stage is to eliminate all viruses. This stage is split into four quadrants, and each portion has viruses inside bubbles and dust viruses. Most of the borders are formed by Empty Blocks and Brick Blocks, except for two skill chargers in the middle next to the Empty Blocks.
	Stage 167	Dr. Mario Dr. Ludwig	The objective of this stage is to eliminate all viruses. In this stage, the top portion has two groups of viruses in ring formations separated by a column of Brick Blocks, while the bottom portion has half-frozen viruses and a single floatie virus. At the topmost row, leftmost column and rightmost column, there is each a clouded virus with the row or column of Empty Blocks. The capsule amount is increased from 35 to 39 since version 2.0.0. Besides that, this stage is otherwise the same.
	Stage 168	Dr. Bowser Dr. Yoshi	The objective of this stage is to eliminate all viruses. In this stage, there are two columns of four dust viruses surrounded by Brick Blocks and Empty Blocks. Between the two groups is a column of viruses with a shell at the bottom. On the leftmost and rightmost columns, there are lock blocks between Empty Blocks on the top and bottom, as well as some viruses below the Empty Blocks. At the two topmost rows, there are two groups of viruses (some are caged) separated by a column of Brick Blocks.
	Stage 169	Dr. Baby Luigi Dr. Toad	The objective of this stage is to eliminate all viruses. In this stage, the bottom portion has normal viruses, clouded viruses and viruses inside bubbles, while the middle portion has viruses inside bubbles and clouded viruses. The top portion contains clouded viruses surrounded by Brick Blocks on the side and Empty Blocks below.
	Stage 170 (Hard)	Dr. Baby Daisy Dr. Ludwig	The objective of this stage is to collect all purple coins. In this stage, eight rows of four purple coins are joined in the middle from the second to ninth rows. Viruses (normal, half-frozen and fully-frozen) are located above each row of coins. Purple coins are unlocked in the following sequence: The coins in the second and third rows. The coins in the eighth and ninth rows. The coins in the sixth and seventh rows. The coins in the fourth and fifth rows. Prior to version 1.3.5, the stage layout was different. The following changes were made: The viruses in the fourth and fifth rows are changed from normal to fully-frozen. The viruses in the sixth and seventh rows are changed from normal to half-frozen. The capsule amount is decreased from 35 to 23 since version 2.0.0. Besides that, the unlocking order of purple coins has changed so that the coins in the eighth and ninth rows are unlocked second (previously last) while the coins in the fourth and fifth rows are unlocked last (previously second).
	Stage 171	Dr. Toadette Dr. Kamek	The objective of this stage is to eliminate all viruses. In this stage, there are scattered fully-frozen viruses that include floatie viruses. The Brick Blocks in the middle column have hidden viruses.
	Stage 172	Dr. Fire Mario Dr. Toad	The objective of this stage is to eliminate all viruses. In this stage, there are clouded viruses on the leftmost column, along with half-frozen viruses above and on the left of Brick Blocks. Viruses inside bubbles are located below Brick Blocks.
	Stage 173	Dr. Bowser Dr. Luma	The objective of this stage is to eliminate all viruses. In this stage, most of the viruses are caged while the others are half-frozen or hidden inside Brick Blocks. The lock blocks are located in the middle of the stage as well as the top-left and top-right corners.
	Stage 174	Dr. Yoshi Dr. Peach	The objective of this stage is to eliminate all viruses. In this stage, the topmost row, leftmost column and rightmost column contain clouded viruses and a clouded lock block below or between Empty Blocks. The middle of the stage contains cages surrounded by half-frozen viruses, and one of the cages contain an exploder. The capsule amount is increased from 37 to 40 since version 2.0.0. Besides that, this stage is otherwise the same.
	Stage 175	Dr. Kamek Dr. Mario	The objective of this stage is to collect all purple coins. In this stage, there are four rows of Brick Blocks and purple coins alternating, with viruses above each row (one of them has half-frozen viruses) and dust viruses on the leftmost and rightmost columns. Purple coins are unlocked in the following sequence: The middle coin in the eighth row. The first coin in the fourth row and the first two coins in the sixth row. The last coin in the fourth row and the last two coins in the sixth row. The middle two coins in the second row. The last coin in the second row and the first coin in the eighth row. The first coin in the second row and the last coin in the eighth row. The middle coin in the fourth row.
	Stage 176	Dr. Toadette Dr. Kamek	The objective of this stage is to eliminate all viruses. This stage is shaped like a fish with a blowhole. The "blowhole" portion is formed by half-frozen viruses and one of them is a floatie virus. Within the "fish" are four floatie viruses and part of its "tail" is formed by Brick Blocks with one virus next to it.
	Stage 177	Dr. Luma Dr. Bowser Jr.	The objective of this stage is to eliminate all viruses. In this stage are clouded viruses and viruses inside bubbles, alongside a few Brick Blocks.
	Stage 178 (Hard)	Dr. Baby Luigi Dr. Toadette	The objective of this stage is to eliminate all viruses. In this stage, groups of viruses inside bubbles are surrounded by Brick Blocks and Empty Blocks. Prior to version 2.0.0, the stage layout was different. The following changes were made: The Empty Block in the tenth row is removed. Four of the Brick Blocks are removed: the first and last ones in the first row, the last one in the third row and the last one in the fifth row.
	Stage 179	Dr. Yoshi Dr. Kamek	The objective of this stage is to eliminate all viruses. This stage is shaped like a Fire Flower, which is formed with normal viruses, floatie viruses and Brick Blocks. The Brick Blocks between the floatie viruses contain hidden normal viruses, while the "stem" contains hidden floatie viruses. The capsule amount is increased from 32 to 35 since version 1.3.5. Besides that, this stage is otherwise the same.
	Stage 180	Dr. Toad Dr. Bowser	The last stage of the first area, the objective of this stage is to eliminate all viruses. At the beginning of the stage, there is a group of Brick Blocks surrounding three isolated exploders and a group of viruses, and clouded viruses are at the top-right side. As the stage scrolls, ten viruses inside bubbles, four half-frozen viruses and two clouded viruses are found in addition to twenty normal viruses, as well as a shell. This stage will scroll for one line each time enough objects are cleared and will stop after 9 lines are introduced. When cleared, the rest of the first area in the world map gets cleared of viruses. Players also obtain 500 coins upon completing this stage. Prior to version 2.0.0, the stage layout was different. The following changes were made: Capsule amount is reduced from 56 to 50. The row of Empty Blocks visible after the stage scrolled all the way is removed, moving all the stage objects one row above. The Brick Blocks in the beginning within the second and third rows and second and third columns are changed to regular viruses. A bubble virus is added in the third column in the row that is visible after the stage scrolls up once. The shell visible after the stage scrolls up three times is no longer half-frozen. The second and fourth Brick Blocks visible after the stage scrolls up seven times are changed to normal viruses.

Area 2

Image	Stage	Best Doctors	Overview
	Stage 181	Dr. Fire Luigi Dr. Peach	The objective of this stage is to eliminate all viruses. In this stage, there are two rows of Empty Blocks with a shell in between each of them. Betweek the shells are exploders, which are between either Empty Blocks, clouded viruses or a lock block. On the left and right sides between the Brick Blocks are cages, where the yellow cages are surrounded by blue cages and contain viruses and one lock block.
	Stage 182	Dr. Ludwig Dr. Fire Mario	The objective of this stage is to eliminate all viruses. In this stage, all the viruses are frozen. The two groups of viruses forming an "L" each have fully-frozen viruses with a half-frozen floatie virus at the pivot, while the others are near a set of Empty Blocks at the top-right and a set of Brick Blocks at the bottom-left.
	Stage 183	Dr. Fire Luigi Dr. Baby Rosalina	The objective of this stage is to eliminate all viruses. This stage looks like an umbrella with rain droplets represented by viruses (normal and floatie viruses) inside bubbles. The "handle" is formed by Brick Blocks with hidden viruses while the "canopy" is formed by frozen viruses.
	Stage 184	Dr. Baby Mario Dr. Diddy Kong	The objective of this stage is to eliminate all viruses. This stage is shaped like the letter "M" formed by normal viruses, viruses inside bubbles, Brick Blocks and Empty Blocks. Hidden viruses are inside the Brick Blocks two spaces above the bubbles in the third to seventh columns. Prior to version 2.0.0, the stage layout was different. The following changes were made: The Brick Blocks at the first row in the second and eighth columns no longer contain hidden viruses.
	Stage 185	Dr. Yoshi Dr. Luigi	The objective of this stage is to collect all virus coins. In this stage, the center contains a frozen virus surrounded by floatie viruses, join by viruses at the middle column and fifth row. The first row and ninth rows contain viruses in the odd-numbered columns, with two exploders found at the second row. Prior to version 1.3.5, the stage layout was different. The following changes were made: Capsule amount is increased from 42 to 45. Exploders are added in the second and eight columns in the second row, replacing Brick Blocks. Prior to version 2.0.0, the stage layout was different. The following changes were made: The floatie viruses are no longer half-frozen. The middle virus is fully-frozen instead of half-frozen. The viruses found in the second column, eighth column, second row and eighth row are changed to half-frozen.
	Stage 186	Dr. Toad Dr. Daisy	The objective of this stage is to eliminate all viruses. The caged viruses in this stage spell "LOVE", with lock blocks throughout the stage. Hidden viruses are within the Brick Blocks between the blue and yellow lock blocks (5) and within the yellow cages (4). Prior to version 2.0.0, the stage layout was different. The following changes were made: The cages are moved up one row, and subsequently, the Brick Blocks in the tenth row are removed. The lock blocks have their positions changed: the yellow lock block moved from the first row to the fifth row, the blue lock block moved from the sixth row and fourth column to the fifth row and the second column, the red lock block moved from the eighth row to the ninth row. A hidden virus is added where the blue lock block used to be, relative to the changing position of the letters.
	Stage 187	Dr. Fire Mario Dr. Toadette	The objective of this stage is to eliminate all viruses. In this stage, there are three cages in the middle column surrounded by Brick Blocks, and one of the lock blocks is in one of the cages. One of the other lock blocks surrounded by a different set of Brick Blocks while the other is on the rightmost column. Other viruses that are present include clouded viruses and viruses inside bubbles. A shell is located at the leftmost position in the tenth row. The capsule amount is increased from 35 to 40 since version 2.0.0. Besides that, this stage is otherwise the same.
	Stage 188	Dr. Bowser Jr. Dr. Bowser	The objective of this stage is to eliminate all viruses. This stage is shaped like a dangling pot, where its "contents" are viruses inside bubbles. A shell is lined up with Brick Blocks and viruses above the bubbles. Floatie viruses are located in the second row.
	Stage 189 (Hard)	Dr. Goomba Tower Dr. Peach	The objective of this stage is to eliminate all viruses. In this stage, there are cages in the fifth and sixth rows, as well as near the corners. The Brick Blocks are in the middle column, where two of them are surrounded by Brick Blocks and one is caged. A caged skill charger is located directly below the middle lock block. Prior to version 2.0.0, the stage layout was different. The following changes were made: Capsule amount is reduced from 48 to 46. The Empty Blocks and the first and last Brick Blocks in the third row are changed to caged Brick Blocks. The middle caged virus in the fifth row is changed to a caged lock block that corresponds to the caged Brick Blocks mentioned above. Cages are removed from the fourth column and sixth column of viruses. The Brick Blocks in the tenth row no longer contain hidden viruses.
	Stage 190	Dr. Toad Dr. Bowser	The objective of this stage is to collect all virus coins. In this stage, there are four rings of cages surrounding a group of four viruses each, and each of those groups has a virus coin behind. Separating the cages are lines of viruses, with a lock block in the middle and an additional lock block in the middle of the first row. The sixth row of viruses, as well as the viruses above and below the middle lock block, have virus coins behind them. The capsule amount is increased from 25 to 32 since version 1.3.5. Besides that, this stage is otherwise the same.
	Stage 191	Dr. Peach Dr. Waluigi	The objective of this stage is to eliminate all viruses. In this stage, there is a group of viruses in bubbles around the bottom middle part and two groups of dust viruses on its left and right. Above each group of dust viruses is a clouded floatie virus surrounded by Brick Blocks, which is partially surrounded by normal viruses. The Brick Blocks in the fourth and sixth columns contain hidden viruses. The capsule amount is increased from 40 to 43 since version 2.0.0. Besides that, this stage is otherwise the same.
	Stage 192	Dr. Diddy Kong Dr. Fire Mario	The objective of this stage is to eliminate all viruses. In this stage, there are two groups of Empty Blocks along with a group of alternating Empty Blocks and Brick Blocks each forming a right-angle line, with half-frozen viruses hugging them. At the bottom of those groups are two rows of frozen viruses and Brick Blocks with shells on their right.
	Stage 193	Dr. Baby Luigi Dr. Ludwig	The objective of this stage is to eliminate all viruses. This stage is shaped like a tree, formed by viruses, floatie viruses and Brick Blocks. Some of the viruses are frozen. The middle column of Brick Blocks contains a skill charger at the top and hidden viruses in the others.
	Stage 194	Dr. Baby Mario Dr. Goomba Tower	The objective of this stage is to eliminate all viruses. In this stage, there are several viruses inside bubbles, as well as dust viruses among the Brick Blocks. At the topmost row is a row of five clouded viruses that is enclosed by Empty Blocks.
	Stage 195	Dr. Koopa Troopa Dr. Yoshi	The objective of this stage is to collect all coins from Coin Blocks. In this stage, there are two rows of cages, and the corresponding lock blocks are surrounded by Brick Blocks. At the higher corners are exploders. The Brick Blocks adjacent to the empty spaces in the third column and seventh column are Coin Blocks, while some of the Brick Blocks contain hidden viruses. Prior to version 1.3.5, the stage layout was different. The following changes were made: Some of the Brick Blocks are removed, revealing the normal viruses for those that originally had hidden viruses. Exploders are added at the corners in the first row. Brick Blocks and Empty Blocks are removed in the tenth row, except for the leftmost Empty Block. The Empty Blocks in the top-right are changed to Brick Blocks (except the corner, which has an exploder). The Brick Blocks in the middle column between the two rows of cages are replaced by one Empty Block in the higher row.
	Stage 196	Dr. Daisy Dr. Peach	The objective of this stage is to eliminate all viruses. In this stage, the right portion contains viruses inside cages, with their corresponding lock blocks in the first row (one is hidden in the Brick Block) where a virus is between them. The left portion contains viruses inside bubbles and Empty Blocks. Bridging the two portions are two rows of Brick Blocks.
	Stage 197	Dr. Kamek Dr. Yoshi	The objective of this stage is to eliminate all viruses. In this stage, there is a column of five viruses in the middle surrounded by Brick Blocks and Empty Blocks. Three lines of clouded viruses, one horizontal and two vertical are also surrounded by Brick Blocks and Empty Blocks. On the bottom-left and bottom-right are viruses inside bubbles. Prior to version 2.0.0, the stage layout was different. The following changes were made: Capsule amount is reduced from 39 to 37. Brick Blocks are removed from the top-left and top-right corners. The second to fifth rows in the third and sevent columns are changed to Brick Blocks.
	Stage 198	Dr. Kamek Dr. Fire Peach	The objective of this stage is to eliminate all viruses. In this stage, the leftmost and rightmost columns have fully-frozen viruses, and in between the highest and lowest point of both columns are caged viruses. In the middle, there are two columns of five viruses and one lock block, and in between are three Brick Blocks (all with hidden viruses) in a column with one space apart. Prior to version 2.0.0, the stage layout was different. The following changes were made: The middle column is changed from two Brick Blocks (both with hidden viruses) and two Empty Blocks to three Empty Blocks (all with hidden viruses) each with one space apart.
	Stage 199 (Hard)	Dr. Fire Rosalina Dr. Fire Peach	The objective of this stage is to eliminate all viruses. In this stage, fully-frozen viruses form the number 99 between two rows of viruses inside cages. Within the first, fourth, sixth and last columns, there are hidden viruses, while the other Brick Blocks do not have anything inside. A lock block is within the hole of the first "9". Prior to version 2.0.0, the stage layout was different. The following changes were made: Capsule amount is reduced from 54 to 50. The Brick Blocks in the second, third, seventh and eighth columns no longer contain hidden viruses, leaving only the first, fourth, sixth and last columns with them.
	Stage 200 (Hard)	Dr. Yoshi Dr. Fire Mario	The final stage is a scrolling stage that requires all viruses to be eliminated. At the beginning of the stage, there are dust viruses and clouded viruses in addition to normal viruses placed around Brick Blocks and Empty Blocks. Further up the stage are floatie viruses and hidden viruses inside Brick Blocks. This stage will scroll for one line each time enough objects are cleared and will stop after 5 lines are introduced. Once it is cleared, the remaining area of the stage map gets cleared of viruses, and players can access World 6. Upon completion, players earn a free Staff Ticket. Prior to version 2.0.0, the stage layout was different. The following changes were made: The row of Empty Blocks visible after the stage scrolled all the way is removed, moving all the stage objects one row above. The floatie viruses in the row that appear after the stage scrolls twice are changed to normal viruses.

Challenge stages

Image	Stage	Best Doctors	Overview
	Stage 5A	Dr. Toad Dr. Ludwig	Within a 105 second time limit, players need to eliminate all viruses. In this stage, viruses are lined up against lines of Empty Blocks and Brick Blocks, with most of them being half-frozen. The top-left portion of viruses are enclosed by Empty Blocks. Starting from version 1.2.0, completing this stage awards the player 500 coins. The timer is increased 90 seconds to 105 seconds since version 2.0.0. Besides that, this stage is otherwise the same.
	Stage 5B	Dr. Bowser Jr. Dr. Daisy	Within an 85 second time limit, players need to eliminate all viruses. In this stage, viruses inside bubbles are surrounded by caged viruses and Brick Blocks, with their corresponding lock blocks in the middle column. Starting from version 1.2.0, completing this stage awards the player 500 coins. The timer is increased from 65 seconds to 85 seconds since version 2.0.0. Besides that, this stage is otherwise the same.
	Stage 5C	Dr. Peach Dr. Fire Luigi	Within a 107 second time limit, players need to eliminate all viruses. In this stage, the leftmost and rightmost columns contain fully-frozen viruses, along with caged viruses between the top and bottom of each column. In the middle are clouded lock blocks surrounded by Brick Blocks and Empty Blocks, along with two groups of clouded viruses. Completing this stage awards the player 1000 coins and a Staff Ticket (3 Hearts prior to version 1.2.0). The timer is increased from 90 seconds to 107 seconds since version 2.0.0. Besides that, this stage is otherwise the same.

Special Stage

Image	Stage	Best Doctors	Overview
	Special Stage	Dr. Kamek Dr. Fire Mario	The objective of this stage is to eliminate all viruses. In this stage, there are three sections separated by two separate rows of Empty Blocks. Each section has a row or Brick Blocks with viruses between them and the row of Empty Blocks. In addition to normal viruses, the middle section contains floatie viruses and viruses inside bubbles, while the top section contains clouded viruses and dust viruses (both types also contain floatie viruses). This stage will scroll for one line each time enough objects are cleared or enough capsules are introduced to the stage and will stop after 3 lines are introduced. Completing this stage awards the player 1000 coins and Dr. Toadette.

Stage layouts in previous versions

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  Stage 170 prior to version 1.3.5

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  Stage 185 prior to version 1.3.5

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  Stage 195 prior to version 1.3.5

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  Stage 178 prior to version 2.0.0

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  Stage 180 prior to version 2.0.0

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  Stage 184 prior to version 2.0.0. The changed virus amount is due to less hidden viruses inside the Brick Blocks.

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  Stage 185 prior to version 2.0.0

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  Stage 186 prior to version 2.0.0

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  Stage 189 prior to version 2.0.0

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  Stage 197 prior to version 2.0.0

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  Stage 198 prior to version 2.0.0

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  Stage 199 prior to version 2.0.0. The changed virus amount is due to less hidden viruses inside the Brick Blocks.

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  Stage 200 prior to version 2.0.0