Mushroom battle

Mushroom battles are a feature of Pikmin Bloom, unlocked at level 8. Mushrooms of various types and sizes appear around the world, and players can send groups of Pikmin to attack them. Multiple players can join a battle, and participants will receive fruit and a postcard as a reward, and a score that measures how well they did. Up to three mushroom battles can be done by a player in a day, but additional battles can be joined by spending a Mushroom Recharge Ticket.

The amount of Pikmin that can be sent on a mushroom battle by a player will increase over time based on the player's level, starting at 10 Pikmin and reaching a maximum of 40 Pikmin at level 20. The mushroom battle selection screen lets the player choose which Pikmin to send and shows the strength of the squad and how long the battle will take. The higher the strength, the faster the Pikmin will be at completing the battle. Up to 5 people can battle a single mushroom at once, each sending their own groups of Pikmin, and after reaching this number, additional players can join (up to a maximum of 25 for small mushrooms, 30 for normal mushrooms, 35 for large mushrooms, and 40 for giant mushrooms) by using a Mushroom Recharge Ticket. Players can also call their friends for help in the mushroom by using a Mushroom Battle Bullhorn.

Mushrooms

A small red mushroom on the map screen. The red circle indicates its health.

Mushrooms grow at points of interest in the real world, similar to Big Flowers. They can only be seen and interacted with when they are less than 600 meters away from the player. After the mushroom is destroyed, it grows back in the same location 5 minutes later, without any input. As of the update on December 13^th, 2023, mushrooms that have not been cleared for 24 hours will automatically regrow at 18:00 UTC. Whether regrowth is automatic or following the destruction of the previous mushroom, the mushroom type that grows is randomized.

Mushrooms come in various types that differ in size and type. The hierarchy of the sizes are small, normal, large, and giant, with each size increasing in health. The larger the mushroom, the bigger the reward for destroying it. There are 13 basic types of mushrooms – 8 regular colors, and 5 special types. Fire Mushrooms can only be fought by Red Pikmin, Water Mushrooms can only be fought by Blue Pikmin, Electric Mushrooms can only be fought by Yellow Pikmin, Poisonous Mushrooms can only be fought by White Pikmin, and Crystal Mushrooms can only be fought by Rock Pikmin. All other types can be fought by Pikmin of any type. The type of mushrooms determines the type of nectar players can get as a reward.

Mushroom health

Type	Small	Normal	Large
Red	87,400	670,600	2,916,000
Yellow	84,200	645,800	2,808,000
Blue	84,200	645,800	2,808,000
Purple	93,900	720,300	3,132,000
White	81,000	621,000	2,700,000
Pink	81,000	621,000	2,700,000
Gray	90,700	695,500	3,024,000
Ice Blue	81,000	621,000	2,700,000
Fire	N/A	3,850,200	13,662,000
Water	N/A	3,816,700	13,543,200
Crystal	N/A	3,883,600	13,780,800
Electric	N/A	3,816,700	13,543,200
Poisonous	N/A	3,783,200	13,424,400

How those mushroom healths are calculated

Mushroom health is based on the attack strength of the corresponding Pikmin type. It is calculated by the formula 100 × floor(1080 × scale × (23 + type)), where scale and type are given by the following tables: scale Small Normal Large Giant Regular 3% 23% 100% 120% Special N/A 31% 110% N/A Type type Red 4 Yellow 3 Blue 3 Purple 6 White 2 Pink 2 Gray 5 Ice Blue 2 Fire 92 Water 91 Crystal 93 Electric 91 Poisonous 90

Colored giant mushroom health
Mushroom health Type Giant Red 3,499,200 Yellow 3,369,600 Blue 3,369,600 Purple 3,758,400 White 3,240,000 Pink 3,240,000 Gray 3,628,800

Mushroom healths on December 14th and 15th, 2022

Mushroom health Type Small Normal Large Brown 207,300 1,589,700 3,455,000 Red 349,900 2,662,700 5,832,000 Yellow 336,900 2,583,300 5,616,000 Blue 336,900 2,583,300 5,616,000 Purple 375,800 2,881,400 6,264,000 White 324,000 2,484,000 5,400,000 Pink 324,000 2,484,000 5,400,000 Gray 362,800 2,782,000 6,048,000 Fire N/A 12,420,000 26,082,000 Water N/A 12,312,000 25,855,200 Crystal N/A 12,528,000 26,308,800

Mushroom healths before December 14th, 2022
Mushroom health Color Small Normal Large Giant Brown, red, yellow, and blue 4,800 21,000 73,000 170,000 Purple and gray 6,300 28,000 94,000 N/A White and pink 3,400 15,000 51,000 N/A Giant mushrooms only came in the red color, and were extremely rare.

Process

The screen that appears when a mushroom is selected.

Selecting Pikmin for a mushroom battle.

When a mushroom is selected, either from the map screen or expedition list, the camera will focus on the mushroom, with a photograph of its corresponding real-world landmark behind it. The screen displays some basic information about the mushroom, such as its remaining health, the time left until it is destroyed, and the rewards for destroying, as well as circles that can be filled with icons of the Miis of the players who have joined the battle.

If the player that joined the mushroom is on the player's friend list, their icon will have a green border. If the player that joined the mushroom joined from the player's Mushroom Battle Bullhorn invitation, their icon will have a pink border. Clicking on another player's Mii icon will open a menu that allows you to send a reaction and view their total attack power. If the player is on your friend list, you also have the option to send them a postcard or a gift. If the player clicks on their own icon in this menu, they will be able to view their total attack power, what reactions they have received, and buttons to either edit their Mii or open their friend list.

There is a Join button which when clicked progresses to the selection screen. The button will be grayed out if the participant limit has already been reached. If the player has run out of daily tries, a Mushroom Recharge Ticket will be displayed inside. In the selection screen, the player can manually choose which Pikmin to send, or have the game automatically select Pikmin with the Auto button. The Auto button will always select the top 40, which will changed based on how their Pikmin list is currently sorted. By tapping a Pikmin in this list, it can be added to or removed from the group that is being sent to attack the mushroom.

The minimum size of this group depends on the size of the mushroom being battled, as shown in the table below.

Mushroom size	Minimum squad size
Small	1
Normal	10
Large	15
Giant	20

The maximum size of the group depends on the player's level, as shown in the table below.

Mushroom battle size	Minimum level
10	8
15	10
20	12
25	14
30	16
35	18
40	20

Pikmin with an advantage against that mushroom type (see the next section) may jump in the list when selected for the battle. Selected Pikmin also appear in front of the mushroom in the camera view. Since December 14^th, 2022, after selecting at least 1 Pikmin, a nectar button appears in the lower half of the screen and can be tapped to feed the selected Pikmin. The player will be taken to a separate garden screen where selected Pikmin can be fed. There is a GO button in the lower right corner; tapping it sends all the selected Pikmin to attack the mushroom. If the player has run out of daily tries, they will be asked to use a Mushroom Recharge Ticket before proceeding. Additional tickets can be purchased from this screen by tapping the "Add Tickets" button.

Red Pikmin destroying one part of a small red mushroom.

Once the Pikmin are sent on the mushroom battle, they rush towards the mushrooms and start attacking them. Most Pikmin types latch on to a mushroom and start attacking it at a constant rate, with each attack doing some damage. Rock Pikmin instead jump towards a mushroom from a distance and roll back to jump again. From time to time, Pikmin get off the mushroom, walk back to their starting position, and walk back to the mushroom to start attacking again. Each hit decreases the health of the mushrooms, though not by a set amount; see the Time section for more details. From time to time, one of the mushrooms in the group will collapse, leaving the Pikmin attacking it to start attacking another one. The intervals at which mushrooms break depend on the number of the mushrooms in the cluster: 4 for small, 7 for normal, and 10 for large, such that mushrooms break at regular intervals. For example, in a large mushroom group, one of the mushrooms will break for each tenth of health depleted. After joining a mushroom battle, player icons can be tapped to send a reaction, chosen from four different types of reactions. A reaction can be changed at any time once sent. Mushroom battles can be left using the "Leave" button. Doing so will not give the player an extra attempt for the day.

When the health is fully depleted, the mushroom battle is cleared. The player is provided with their score, the time it took to destroy the mushrooms, and a star rating, followed by the Pikmin bringing a postcard about their battle and a small number of fruits to be given to the player. Each Pikmin that was sent on the battle also gains some friendship (though this actually happens at the start of the battle, not the end).

How joining mushroom battles worked before December 14th, 2022
Prior to update 59.0, players could not leave current battles or send reactions to one other. The selection screen did not display rewards. Only up to three mushroom battles could be done in a day, as Mushroom Recharge Tickets had not yet been introduced to the game. Selected Pikmin could not be fed nectar from the selection screen.

Attack power

When the player is selecting Pikmin for the mushroom battle, a power value appears in the bottom-right of the upper display, alongside an image of two Pikmin. This shows how strong the selected squad is against that mushroom. Adding a Pikmin will increase the value by some amount. This amount depends on the type of Pikmin, whether it is a Decor Pikmin, its maturity, its friendship, and the color of the mushroom being attacked.

Different attack displays indicating the anticipated star rating of a battle, based on attack total alone.

As the requirements for each star rating are met by the squad's total attack, the display changes in design, colour and effects. While the total attack is less than the required score for 2 stars, the display is green and shows a single star between the two Pikmin icons. Once the attack total exceeds the score for 2 stars, the display changes to yellow backed by a golden glow, and two stars are shown between the Pikmin icons. When the squad's attack grows greater than the required score for 3 stars, the display changes to a light orange colour, backed by an orange glow with small orange sparks, and three stars appear between the Pikmin icons. And when the attack total overtakes the score needed for 4 stars, the display changes to a darker orange, with a vibrant blue glow backed by white sparks and multicolored fireworks, and four stars are shown between the pair of Pikmin icons.

Each Pikmin type has a base attack power. These attack powers are shown in the table below.

Type	Base attack power
Red Pikmin	4
Yellow Pikmin	3
Blue Pikmin	3
Purple Pikmin	6
White Pikmin	2
Winged Pikmin	2
Rock Pikmin	5
Ice Pikmin	2

Added to the base attack power is a value for whether the Pikmin is a Decor Pikmin or not.

Decor	Added attack power
Yes	4
No	0

Added to the total so far is a value for the Pikmin's maturity. From August 2023, the Flower of the Month gives an additional point more than other seasonal flowers.

Maturity	Added attack power
Leaf	1
Bud	2
Regular flower	3
Seasonal flower	4
Flower of the Month	5
Bare	0

Added to the total so far is a value for the Pikmin's friendship.

Friendship	Added attack power
0 hearts	0
1 heart	1
2 hearts	2
3 hearts	3
4 hearts	4
1 yellow heart	8
2 yellow hearts	12
3 yellow hearts	16
4 yellow hearts	20

Finally, added to the total so far is a value to represent the Pikmin type's strength against the type of mushroom being fought.

Type matchup chart		Defending mushroom type
		Red	Yellow	Blue	Purple	White	Pink	Gray	Ice Blue	Fire	Electric	Water	Poisonous	Crystal	Event
Attacking Pikmin type	Red	12	3	0	3	0	3	0	3	100	N/A	N/A	N/A	N/A	0
	Yellow	3	12	0	3	0	3	3	3	N/A	100	N/A	N/A	N/A	0
	Blue	0	3	12	3	0	3	3	3	N/A	N/A	100	N/A	N/A	0
	Purple	3	3	0	12	0	3	3	3	N/A	N/A	N/A	N/A	N/A	0
	White	3	3	0	3	12	3	0	3	N/A	N/A	N/A	100	N/A	0
	Winged	3	3	3	3	0	12	0	3	N/A	N/A	N/A	N/A	N/A	0
	Rock	3	3	0	3	0	3	12	3	N/A	N/A	N/A	N/A	100	0
	Ice	0	3	3	3	0	3	3	12	N/A	N/A	N/A	N/A	N/A	0
	During Decor Pikmin events, add an additional
	Primary Decor	15	15	15	15	15	15	15	15	15	15	15	15	15	300
	Secondary Decor	15	15	15	15	15	15	15	15	15	15	15	15	15	100

How attack power was calculated before December 14th, 2022

The attack power of a Pikmin originally depended on 5 variables: the type of Pikmin, its friendship, its maturity, whether it was a Decor Pikmin, and the color of the mushroom being attacked. The equation below was the overall equation for calculating the power contributed by a single Pikmin; the paragraphs below explain what each variable means. Each Pikmin type had a base attack power. Red Pikmin, Yellow Pikmin, and Blue Pikmin all had the standard base attack power. White Pikmin and Winged Pikmin were slightly weaker, while Purple Pikmin and Rock Pikmin were slightly stronger. The exact values used are in the table below. Type Base attack power Red, Yellow, and Blue Pikmin 4 White and Winged Pikmin 2.8 Purple and Rock Pikmin 5.2 A Pikmin's maturity contributed to how strong it was. Leaf Pikmin had the standard attack power, and each maturity level above that increased the power slightly. Rare flowers, such as pansies and roses, were stronger than regular flowers. Bare Pikmin, obtained by feeding them too much nectar, were slightly weaker. The exact values used are in the table below. Maturity Attack power multiplier Leaf 1 Bud 1.1 Normal flower 1.2 Seasonal flower 1.3 Bare 0.9 A Pikmin's friendship contributed to its strength. For the purposes of the formula, the value used was the number of completed hearts. The fractions of a heart between full hearts didn't matter, so a Pikmin with 1.1 hearts of friendship and a Pikmin with 1.8 hearts of friendship had the same attack power of 1. The number of full hearts ranged from 0 to 4, so a value in this range was used in the formula. If a Pikmin is a Decor Pikmin, 4 points were added to its attack power. This variable in the equation could be either 0 (for non-Decor Pikmin) or 4 (for Decor Pikmin). The final variable was the type of mushroom, and this was the last step in calculating attack power. If a Pikmin was the same color as the mushroom, its attack power was multiplied by 2. In other cases, certain Pikmin types may have an advantage or disadvantage against certain mushroom types. The multipliers for each Pikmin-mushroom combination are in the table below. Type matchup chart Defending mushroom type Brown Red Yellow Blue Purple White Pink Gray Attacking Pikmin type Red 1× 2× 0.9× 0.9× 1.1× 0.9× 1.1× 1× Yellow 1× 1× 2× 0.9× 1× 0.9× 0.9× 1× Blue 1× 0.9× 1× 2× 1.1× 0.9× 0.9× 1× Purple 1× 1.1× 1× 0.9× 2× 0.9× 1.1× 1× White 1× 0.9× 0.9× 0.9× 1× 2× 1× 1.1× Winged 1× 1× 0.9× 0.9× 1× 1× 2× 0.9× Rock 1× 1× 1× 1× 1× 1.1× 1× 2× As an example, picture a standard Purple Pikmin with 2.5 hearts of friendship and a bud on its head, against a red mushroom. This gives it a base damage of 5.2, a maturity multiplier of 1.1, a friendship value of 2, a Decor bonus of 0, and a mushroom multiplier of 1.1. Putting these values in the formula gives (5.2 × 1.1 × (1 + 2/10) + 0) × 1.1, or 7.5504. The game would round this up to 8 for displaying to the player.

Time

The time bonus awarded after clearing a mushroom battle.

The amount of time it takes to destroy a mushroom (in seconds) is calculated by taking the health of the mushroom, dividing it by the total attack power of the Pikmin attacking the mushroom, and multiplying it by 100. For example, a normal-size mushroom with 397,400 health, attacked by a group of Pikmin with 450 attack power, should take 88,311 seconds to destroy, or 1 day, 31 minutes and 51 seconds.

When another player joins the mushroom, the remaining time is recalculated based on the current health remaining on the mushroom and the total attack power of all Pikmin of all players attacking the mushroom. Using the previous example, if another player joins the mushroom after 1 hour, the mushroom will have 381,200 health left. If they join with 500 power (giving a total of 950 power), the remaining time will become 40,126 seconds, or 11 hours, 8 minutes and 46 seconds.

Although the game presents damage as something dealt by each individual attack, each Pikmin hit actually does as much damage as it needs to decrease the health of the mushrooms at a linear rate such that they are fully destroyed at the calculated time.

How time was calculated before December 14th, 2022
Originally, the amount of time it took to destroy a mushroom (in seconds) was calculated by taking the health of the mushroom, dividing it by the total attack power of the Pikmin attacking the mushroom, and multiplying it by 4. Battles would also automatically end after exactly 2 days if they were not done by then.

Reactions

During a mushroom battle with multiple participants, players can send reactions to other participants. There are 4 types of reactions: "Hello", "Thank You", "Nice Mii", and "Nice Squad", each with an icon. Each player can only send 1 reaction to each other participant, and can change this reaction. The total number of reactions of each type each player has received is visible during the battle. They cannot be viewed at the end of the battle, though they do influence titles.

Hello	Thank You	Nice Mii	Nice Squad

Scoring

The screen that appears when a mushroom battle is cleared, and the total score is shown.

At the end of a mushroom battle, the game gives the participants a score and a star rating. The score is equal to the total strength of all Pikmin in the battle, plus a time bonus. Star ratings range from 1 star to 4 stars, and depend on the final score. The score required for each star rating depends on the type of mushroom, and is displayed before joining the battle and after the battle ends.

To calculate the time bonus, the game compares the final time at the end of the battle to various breakpoints that depend on the type of mushroom. The time bonus will either be equal to 5%, 10%, 15%, or 20% of the attack power of all participants, depending on how the time compares to the breakpoints. The breakpoints are calculated by dividing the health of the mushroom by each of the score thresholds for each star rating, and multiplying by 100 to give a result in seconds. This effectively means that if only one player was in the battle and they had a squad strength equal to one of the score thresholds, the length of the battle would be one of the breakpoints. Clearing the battle slower than the 2-star breakpoint gives a time bonus of 5% of the attack power of all participants. Clearing the battle faster than the 2-star breakpoint and slower than the 3-star breakpoint gives a time bonus of 10% of the attack power of all participants. Clearing the battle faster than the 3-star breakpoint and slower than the 4-star breakpoint gives a time bonus of 15% of the attack power of all participants. And clearing the battle faster than the 4-star breakpoint gives a time bonus of 20% of the attack power of all participants.

As an example, a small purple mushroom (which has 93,900 health) would have the following breakpoints:

Stars	Attack Required	Maximum Time	Bonus
☆	0	>4:32:10	5%
☆☆	575	4:32:10	10%
☆☆☆	1160	2:14:54	15%
☆☆☆☆	2380	1:05:45	20%

Note that it's not enough for the attack power to be higher than the score threshold, the time must be faster than the breakpoint. Players joining the battle after it begins will increase the attack power but not decrease the time elapsed so far, so additional strength may be required to make the final time less than the breakpoint.

How scoring worked before December 14th, 2022

At the end of a mushroom battle, the game gave the player a score and a star rating. Star ratings were presented as ranging from 1 to 3, but they actually ranged from 1 to 4. The score obtained was dependent on the attack power of the Pikmin group and the size of the mushroom, and the star rating was dependent on the score. The exact formula for calculating scores was never worked out before the scoring system changed. However, it was clear that it was based around thresholds for each star rating. For small mushrooms, the minimum scores for each star rating were multiples of 720 – 1440 for 2 stars, 2160 for 3 stars, and 2880 for 4 stars (the maximum score). These thresholds were doubled for normal-sized mushrooms, doubled again for large mushrooms, and doubled again for giant mushrooms. Score was calculated according to the time taken to defeat a mushroom, relative to its size and color. This was especially apparent when multiple players joined at different times, as the delay would result in a decline in score, compared to a scenario where the same players joined in unison. Because time requirements were scaled based on mushroom health, attack requirements for a certain score were the same across all mushroom colors, so long as the size was the same. However, this scaling did not factor the matching Pikmin color's base attack. As an example, higher scores could be achieved on purple and grey mushrooms with less Pikmin, as Rock and Purple Pikmin naturally possess the highest base attack of all Pikmin species. The following table shows the approximate minimum total attack power for each star rating and mushroom size, based on experimental data. Note that results when teaming up for mushroom battles may vary due to differences in joining times. The values for giant mushrooms are not exact and are based on rough calculations. Mushroom size ☆☆ ☆☆☆ ☆☆☆☆ Small 185 326 565 Normal 296 731 2,000 Large 832 1,623 2,963 Giant 1,134 2,194 4,534

Rewards

Once a mushroom battle is complete, a postcard and some fruits will appear, and the Pikmin the player sent will collect them. Each participant receives the full reward (rewards are not split between participants). If too few Pikmin were sent on the battle to carry all the rewards, only some rewards will be collected; the postcard has the highest priority. Small fruits, special fruits, and postcards only require 1 Pikmin each to retrieve them, medium fruits require 2 Pikmin per fruit, large fruits require 6 Pikmin per fruit, and giant fruits require 8 Pikmin per fruit. The fruits received depend on the type of mushroom and the star rating. The following table shows the minimum score for each star rating and the in-game display for fruits received by reaching that star rating, with the exception of Event Mushrooms, which shows a possible display of fruits at the rewards screen, as the in-game display only displays question marks. See the Fruit (Pikmin Bloom) article for information on the amount of nectar each fruit type can provide.

Note that the rewards displayed only indicate the size and color of fruit that will be obtained, rather than a guaranteed specific fruit. As an example, a melon in the display indicates that the reward will yield a giant white fruit, meaning either a melon or muscat grapes. The exception to this is the Event Mushrooms, which can give any color of fruit, so only the size is indicated. As an example, a green apple in the display indicates that the reward will yield a large fruit, meaning any among a green apple, lemon, orange, apple, peach, or plum.

Mushroom type		1 star			2 stars			3 stars			4 stars
		Score	Rewards	Minimum Pikmin to collect all rewards	Score	Rewards	Minimum Pikmin to collect all rewards	Score	Rewards