Size and weight variation

Size and weight variation is a game mechanic where different of the same species can vary in size or weight.
==In the core series games==
===Generation II===
At the Lake of Rage, there is a Fishing Guru who requests to see large after the player defeats Team Rocket at their hideout in Mahogany Town. If the Fishing Guru is shown a Magikarp bigger than the previous record, he gives the player a prize; the initial record is 3'6" (105.3 cm). A Pokémon is considered to have beaten the previous record if its calculated size in feet and inches (in millimeters in non-English games) is greater than the previous record. The prize is an Ether in and an Elixir in . In English, there are 16 distinct Magikarp sizes bigger than the initial record (meaning the player can obtain the prize at most 16 times); in other languages, there are 431.
The size of Magikarp is calculated from its individual values (IVs) and its Original Trainer's Trainer ID number. Sizes were intended to follow a , with a of 90 cm (Magikarp's Pokédex height) and of 17.9 cm (approximately); however, due to various bugs and oversights in the code, the sizes of Magikarp only roughly follow this distribution.
====Rates====
In non-English games, large Magikarp are made rarer by regenerating the IVs of wild Magikarp that are 161.6 cm (5'3") or larger 95% of the time, and Magikarp that are between 160.0 cm (5'2") and 161.5 cm (5'3") 76% of the time. In the English-language games, due to an oversight, these values were not properly converted to feet and inches, meaning that the game only attempts to regenerate the IVs of Magikarp that are 6'0" (182.9 cm) or larger; this has no effect, as no Magikarp can be that large.
Magikarp caught in the Lake of Rage were intended to be larger on average than Magikarp caught elsewhere, by regenerating the IVs of wild Magikarp that are 4'0" (122.0 cm) or smaller in English games, or 102.4 cm (3'4") or smaller in non-English games, 60% of the time. Due to a programming error, all wild Magikarp except for those in the Lake of Rage and Routes , , and are larger on average. The other maps are affected due to them having either the same map group (9) or map identifier (6) as the Lake of Rage, instead of needing both the map group and map identifier to match the Lake of Rage.
The following table indicates the base probability of each size of Magikarp, ignoring rerolls and correlations between pseudorandom numbers.
Size 	Size 	Rate
0'7" 	19.0–19.9 cm 	0.015%
1'3" 	40.6 cm 	0.003%
1'4" 	40.7–43.1 cm 	0.076%
1'5" 	43.2–45.7 cm 	0.079%
1'6" 	45.8–48.2 cm 	0.076%
1'7" 	48.3–50.7 cm 	0.076%
1'8" 	50.8–52.8 cm 	0.064%
1'9" 	54.2–55.8 cm 	0.101%
1'10"	55.9–58.4 cm 	0.159%
1'11"	58.5–60.9 cm 	1.355%
2'0" 	61.0–63.4 cm 	2.298%
2'1" 	63.5–66.0 cm 	0.793%
2'2" 	66.1–68.5 cm 	0.763%
2'3" 	68.6–69.7 cm 	0.345%
2'5" 	74.3–76.1 cm 	2.890%
2'6" 	76.2–78.7 cm 	4.294%
2'7" 	78.8–81.2 cm 	5.722%
2'8" 	81.3–83.8 cm 	5.951%
2'9" 	83.9–85.5 cm 	1.892%
2'10"	88.0–88.8 cm 	1.923%
2'11"	88.9–91.4 cm 	5.951%
3'0" 	91.5–93.9 cm 	5.722%
3'1" 	94.0–96.5 cm 	5.951%
3'2" 	96.6–99.0 cm 	5.722%
3'3" 	99.1–101.5 cm 	5.722%
3'4" 	101.6–104.1 cm	5.951%
3'5" 	104.2–106.6 cm	9.473%
3'6" 	106.7–109.2 cm	7.007%
3'7" 	109.3–111.7 cm	5.188%
3'8" 	111.8–114.2 cm	4.297%
4'2" 	128.4–129.5 cm	0.983%
4'3" 	129.6–132.0 cm	2.777%
4'4" 	132.1–134.6 cm	2.777%
4'5" 	134.7–137.1 cm	1.453%
4'6" 	137.2–139.6 cm	0.737%
4'7" 	139.7–142.2 cm	0.040%
4'8" 	142.3–144.7 cm	0.038%
4'9" 	144.8–147.3 cm	0.122%
4'10"	147.4–149.8 cm	0.305%
4'11"	149.9–152.3 cm	0.305%
5'0" 	152.4–154.9 cm	0.317%
5'1" 	155.0–157.4 cm	0.160%
5'2" 	157.5–160.0 cm	0.089%
5'3" 	160.1–162.5 cm	0.038%
====Calculation====
A (rrc) is performed on the 8 bits comprising the Attack and Defense IVs, the 8 bits comprising the Speed and Special IVs, and the 16 bits comprising the Trainer ID. After this, the two 8-bit values are concatenated to form a single 16-bit number, which is then 'd with the Trainer ID, as follows.
y = (256 \cdot \operatorname{rrc}(IV_1) + \operatorname{rrc}(IV_2)) \oplus \operatorname{rrc}(ID)
As a special case, if y < 10, then the Magikarp's length is equal to 190 + y. Otherwise, the value y is used to find the corresponding values of x0, y0, and m in the following table, which defines a approximation of the of a with mean 800 and standard deviation 179. Due to an off-by-one error, the values of x0 are calculated as 2 plus the zero-based index of the column (giving a mean of 800), rather than 3 plus the zero-based index of the column (giving a mean of 900). The column selected was intended to be the first column where y is less than the y0 value of that same column. Due to a programming error, only the high bytes of y and y0 are compared; this causes values to be looked up incorrectly from the table (including rendering the first and last columns inaccessible).
y (less than):	0 	256	512	2560	7680	17664	32512	47616	57600	62464	64512	65024	65280	65280
x0 	2 	3 	4 	5 	6 	7 	8 	9 	10 	11 	12 	13 	14 	15
y0 	110	310	710	2710	7710	17710	32710	47710	57710	62710	64710	65210	65410	65510
m 	1 	2 	4 	20 	50 	100 	150 	150 	100 	50 	20 	5 	2 	1
If one of the entries in the table matches, the final length of the Magikarp in millimeters is then calculated as follows. Due to a programming error, the function does not output 100 \cdot x_0 + \left\lfloor \frac{y - y_0}{m} \right\rfloor as intended. The division routine expects the dividend to be an unsigned 16-bit value, but the subtraction always results in a negative value because y is always less than y0. Additionally, only the low byte of the quotient is read, as the quotient was intended to only range from 1 to 100. These result in the sizes not correctly following a normal distribution as intended.
Size = 100 \cdot x_0 + \left( \left\lfloor \frac{65536 + y - y_0}{m} \right\rfloor \bmod 256 \right)
If none of the entries in the table match (because y \ge 65280), the Magikarp's length is instead equal to 1600 + (y - y_0), where y0 is 65510, the last entry for y0 in the table.
If the game converts this number to feet and inches, the final result will be rounded down to the nearest inch.
===Generations III and IV, Pokémon Brilliant Diamond and Shining Pearl===
In Generations III and and , there are occasionally NPCs who want to see large Pokémon. If shown a Pokémon that exceeds the previous record, the NPC will give the player a prize if it exceeds the previous record. Whether a Pokémon is considered to have beat the previous record differs slightly between games:
* In all Generation III games and non-English Generation IV games, this occurs if its calculated size in millimeters is greater than the previous record.
* In English-language Generation IV games, this occurs if its calculated size in tenths of an inch is greater than the previous record.
* In Pokémon Brilliant Diamond and Shining Pearl, this occurs if its calculated scale factor is greater than the previous record.
The size of these Pokémon is calculated from its individual values (IVs) and its personality value (its encryption constant in Pokémon Brilliant Diamond and Shining Pearl). Sizes follow a , with a of the species' Pokédex height and of 0.179 times the species Pokédex height (approximately).
====Locations====
The characters searching for large Pokémon can be found at the following locations:
Games	Location 	Pokémon	Initial record	Initial record	Initial record	Prize
Games	Location 	Pokémon	US customary 	Metric 	Scale factor 	Prize
 	Sootopolis City	and 	15.7 in 	40.0 cm 	1002 	Elixir
 	Sootopolis City	and 	19.6 in 	50.0 cm 	1000 	Elixir
 	 	 	None 	None 	None 	Net Ball
 	Water Path 	 	None 	None 	None 	Nest Ball
 	 	 	23.7 in 	60.1 cm 	1003 	Net Ball
 	Lake of Rage 	 	41.9 in 	106.5 cm 	1184 	Ether
 	 	 	23.7 in 	60.2 cm 	1003 	Net Ball
====Calculation====
Only the lowest two bytes of the personality value or encryption constant are used in the calculation: p1 (highlighted in blue below) is the least significant byte, while p2 (highlighted in red) is the second least significant byte.
00000000 00000000 00000000 00000000
Additionally, only the four s of each IV are used in the calculation: mathematically, stat' = IV_{stat} \bmod 16.
The first step in the calculation is as follows:
y = 256 \cdot (p_1 \oplus (HP' \cdot (Atk' \oplus Def'))) + (p_2 \oplus (Spd' \cdot (SpAtk' \oplus SpDef')))
For the next step, the value y is used to find the corresponding values of x0, m, and y0 in the following table, which defines a approximation of the of a with mean 1000 and standard deviation 179. The column selected is the first column where y is less than the y0 value of the next column.
y (less than):	10 	110	310	710	2710	7710	17710	32710	47710	57710	62710	64710	65210	65410	65510	65536
x0 	290	300	400	500	600 	700 	800 	900 	1000 	1100 	1200 	1300 	1400 	1500 	1600 	1700
y0 	0 	10 	110	310	710 	2710	7710 	17710	32710	47710	57710	62710	64710	65210	65410	65510
m 	1 	1 	2 	4 	20 	50 	100 	150 	150 	100 	50 	20 	5 	2 	1 	1
The values of x0, m, and y0 are then used to convert the uniformly distributed value y to the normally distributed value x (the scale factor).
x = x_0 + \left\lfloor \frac{y - y_0}{m} \right\rfloor
The final part of the calculation scales h (the species' height in tenths of a meter) by x (the scale factor) to produce the Pokémon's size in millimeters. The size is bounded between 0.29 and 1.725 times the standard metric height for the species (as listed in the Pokédex).
Size = \frac{h \cdot x}{10}
How the final result is rounded differs slightly between games:
* In the Generation III games, the size is rounded down to the nearest millimeter. If the game converts sizes to inches, this rounded size is converted and rounded down to the nearest tenth of an inch.
* In the Generation IV games, the size is rounded down to the nearest millimeter. If the game converts sizes to inches, this rounded size is converted and rounded to the nearest tenth of an inch (rounding half down).
* In Pokémon Brilliant Diamond and Shining Pearl, the size is rounded to the nearest millimeter. If the game converts sizes to inches, the size prior to rounding is converted and rounded to the nearest tenth of an inch.
===Generation VII===
====Pokémon Sun, Moon, Ultra Sun, and Ultra Moon====
In , Totem Pokémon are a type of variant Pokémon that are much larger and heavier than their standard counterparts. They are battled at the end of every trial, having been trained up by their respective Trial Captain to fulfill that role. Their increased weight can influence the mechanics of some moves, such as and .
Pokémon	Pokémon	Introduced	 	 	 	 	
 	Alolan 	 	4'07" 	1.4 m	231.5 lbs.	105.0 kg	
 	Alolan 	 	5'07" 	1.7 m	216.1 lbs.	98.0 kg 	
 	 	 	4'07" 	1.4 m	132.3 lbs.	60.0 kg 	
 	 	 	8'06" 	2.6 m	325.2 lbs.	147.5 kg	
 	 	 	1'04" 	0.4 m	4.4 lbs. 	2.0 kg 	
 	 	 	10'02"	3.1 m	479.5 lbs.	217.5 kg	
 	 	 	4'11" 	1.5 m	127.9 lbs.	58.0 kg 	
 	 	 	6'11" 	2.1 m	178.6 lbs.	81.0 kg 	
 	 	 	2'00" 	0.6 m	28.7 lbs. 	13.0 kg 	
 	 	 	1'04" 	0.4 m	6.2 lbs. 	2.8 kg 	
 	 	 	7'10" 	2.4 m	457.5 lbs.	207.5 kg	
In Pokémon Ultra Sun and Ultra Moon, the is able to obtain Totem-sized Pokémon from Samson Oak at Heahea Beach after meeting him for the first time at , based on how many Totem Stickers the player has obtained. Their size cannot be passed down through Pokémon breeding. Totem-sized Pokémon that originally appeared as Totem Pokémon in Pokémon Sun and Moon are the only ones that can be traded to the original Pokémon Sun and Moon games and deposited in . Totem-sized Pokémon based on Totem Pokémon that only appear in Pokémon Ultra Sun and Ultra Moon cannot be deposited in Pokémon Bank or traded to the original Pokémon Sun and Moon games.
Totem-sized Pokémon that are transferred to revert to their normal-sized forms and do not preserve their increased size.
====Pokémon: Let's Go, Pikachu! and Let's Go, Eevee!====
Unlike in previous games, every Pokémon in can vary in both height and weight. The height and weight from previous Pokédex entries are used as species base height and weight. From there, a Pokémon's height can vary as much as ±40% and their weight can vary as much as +68% to -52%. Additionally, the Pokédex will keep track of the tallest, shortest, heaviest, and lightest Pokémon for every species the player has caught. These variations in height are not visible. Instead, large or small wild Pokémon will have a red or blue aura, respectively, around them, indicating their abnormal size. After being caught, a Pokémon's height and weight can be viewed in the summary screen.
A Pokémon's height and weight are determined by two separate values between 0 and 255, the height scalar and weight scalar respectively. These values are obtained by generating two numbers, one between 0 and 127, and the other between 0 and 128. The numbers are then added together, which forms a triangular distribution that results in average-sized Pokémon being more common.https://twitter.com/Sibuna_Switch/status/1538721164226445312 However, before the player enters Viridian Forest, the game will use a different formula. The game will generate a single number between 48 and 207,https://twitter.com/Sibuna_Switch/status/1538721160514387968 preventing large or small Pokémon from appearing until the player enters Viridian Forest.
The displayed height and weight are calculated as follows;
Height_m = \left(\dfrac{HeightScalar}{255} \times 0.79999995 + 0.6\right) \times BaseHeight
Weight_{kg} = \left(\dfrac{WeightScalar}{255} \times 0.40000004 + 0.8\right) \times \left(\dfrac{HeightScalar}{255} \times 0.79999995 + 0.6\right) \times BaseWeight
The game will then convert height to feet and inches, and weight to pounds.
Pokémon come in five size groups determined by height: XS, S, AV, L, and XL. The odds of encountering a Pokémon with more extreme scalar values can be increased by building up a Catch Combo and using Lures. Using these methods will cause the game to reroll a Pokémon's height scalar and weight values, saving whichever number is the furthest from 128. Lures provide 1 additional roll, while the final tier of a catch combo can create 6 rolls.https://twitter.com/Sibuna_Switch/status/1538721156932444161 These rerolls can still occur before entering Viridian Forest but will never result in a large or small Pokémon.
Rolls 	XS (0-15)	S (16-47)	AV (48-207)	L (208-239)	XL (240-255)
1 roll 	0.824% 	6.298% 	85.756% 	6.298% 	0.824%
2 rolls	1.635% 	11.622% 	73.541% 	11.569% 	1.633%
3 rolls	2.434% 	16.109% 	63.068% 	15.963% 	2.427%
4 rolls	3.22% 	19.877% 	54.086% 	19.609% 	3.207%
5 rolls	3.995% 	23.027% 	46.384% 	22.620% 	3.974%
6 rolls	4.758% 	25.648% 	39.779% 	25.088% 	4.726%
7 rolls	5.509% 	27.814% 	34.116% 	27.096% 	5.465%
Pokémon that are L, XL, S, or XS will receive a permanent 1.2× multiplier to any experience they receive. Catching a Pokémon that is XL or XS will grant the player a size bonus, which is a 4× multiplier to the experience earned that capture.
===Generation VIII===
====Pokémon Sword and Shield====
While generate individual height and weight scalar values the same way as before, these values go unused unless transferred to a game that supports them.
====Pokémon Brilliant Diamond and Shining Pearl====
While generate individual height and weight scalar values the same way as before, these values go unused unless transferred to a game that supports them.
Once again, a Fisherman on can be shown , and will judge their height. The game uses the same calculation from Generation III and IV, only substituting the Pokémon's encryption constant for its personality value.
====Pokémon Legends: Arceus====
Pokémon once again vary in both height and weight in , and variations in height are now visible in-game. Height now varies by ±20%, and weight now varies by +44% to -36%.
Height_m = \left(\dfrac{HeightScalar}{255} \times 0.40000004 + 0.8\right) \times BaseHeight
Weight_{kg} = \left(\dfrac{WeightScalar}{255} \times 0.40000004 + 0.8\right) \times \left(\dfrac{HeightScalar}{255} \times 0.40000004 + 0.8\right) \times BaseWeight
Additionally, alpha Pokémon appear as much larger versions of normal Pokémon. Every alpha Pokémon has their height scalar and weight scalar values automatically set to 255. From there, height and weight receive an additional multiplier. This multiplier is unique for every species, and in some cases, like , this multiplier may even be 1×.
Pokémon sent from to did not come with scalar values. Prior to May 29, 2023 (the release of Pokémon HOME v3.0.0), if a Pokémon without a scalar value was transferred to Pokémon Legends: Arceus, it was assigned the minimum possible scalar value of 0. Starting on May 29, 2023 with the release of Pokémon HOME v3.0.0 (which added compatibility with ), any Pokémon without a scalar value that is transferred to Pokémon Legends: Arceus, Scarlet, or Violet instead is given a randomly-generated scalar value, generated according to the triangular distribution that is used in . Pokémon that had already been assigned a scalar value by visiting Pokémon Legends: Arceus before this update keep their scalar value.
=====Research task requirements=====
Several s may require the player to catch tall, short, heavy, and light specimens. Because alpha Pokémon have both scalars set to 255, they will always count as tall and heavy for the research task.
 Tall Specimen
Pokémon	Pokémon	Minimum Height	Minimum Height	Chance of spawning
 	 	2'6" 	0.75 m 	20.609%
 	 	1'1" 	0.32 m 	22.656%
 	 	5'5" 	1.65 m 	12.597%
 	 	3'3" 	1 m 	10.011%
 	 	4'11" 	1.5 m 	20.609%
 	 	31'2" 	9.5 m 	18.187%
 	 	2'8" 	0.8 m 	50%
 	 	7'7" 	2.3 m 	13.796%
 	 	3'7" 	1.1 m 	12.597%
 	 	1'10" 	.55 m 	12.597%
 	 	2'10" 	0.85 m 	73.528%
 	 	3'7" 	1.1 m 	12.597%
 Small Specimen
Pokémon	Pokémon	Maximum Height	Maximum Height	Chance of spawning
 	 	1' 	0.3 m 	50%
 	 	11" 	0.28 m 	22.135%
 	 	1'6" 	0.45 m 	12.597%
 	 	1'2" 	0.36 m 	12.597%
 	 	2'4" 	0.72 m 	12.597%
 	 	1' 	0.3 m 	50%
 	 	2'4" 	0.72 m 	12.597%
 	 	2'11" 	0.9 m 	12.597%
 	 	1' 	0.3 m 	50%
=====Height and weight locked Pokémon=====
The following Pokémon are height and weight locked, and when caught, will always have a scalar value of 127. If any of the following Pokémon have a value other than 127 such as by transferring one in from a different game, its in-game model will always look as if its height scalar is 127. The Pokédex and summary screen will still reflect their true values.
Due to an oversight, 's scalar values are not locked when spawned in-game.
===Generation IX ===
====Pokémon Scarlet and Violet====
While generate individual height and weight scalar values the same way as before, these values go unused unless transferred to a game that supports them. Instead, a new scale value is used to replace height scalar, and is generated with the same triangular distribution. Height can vary as much as ±20%, and weight no longer varies at all.
Pokémon come in several size groups, and their scale can be judged by a Hiker next to the West Mesagoza Pokémon Center. If the player shows off a Pokémon with a scale of 255 or 0, the will give that Pokémon a Jumbo or Mini Mark, respectively.
Size	Hiker Dialogue
XXXS	Now THIS is a tiny Pokémon! Wow, you almost never see one this little!
XXS 	This is truly a little one! A pint-sized powerhouse of a <Species name>. What a charmer!
XS 	This one seems a good sight smaller than average! It's quite a specimen—take good care of it!
S 	This one seems a little bit smaller than average!
M 	Look at that: a perfectly average-sized specimen! It's the gold standard for normality. Amazing!
L 	This one seems a little bit bigger than average!
XL 	This one seems a good sight bigger than average! It's quite a specimen—take good care of it!
XXL 	This is a serious big'un! Feels comforting to have such a bulky, reliable buddy around, doesn't it?
XXXL	Now THIS is a BIG Pokémon! Wow, you almost never see one this huge!
The scale of a Pokémon can be influenced by Meal Powers, with Humungo Power increasing the odds of finding large Pokémon, and Teensy Power increasing the odds of finding small Pokémon. This is done by limiting the scale range of any Pokémon spawns that match the Meal Power's type. Instead of generating two values and adding them together, Meal Powers will only generate a single random number in that range. If a Pokémon is affected by both a Humungo and Teensy power at the same time, its scale can generate in either range.https://twitter.com/Sibuna_Switch/status/1602863369249488896
Humungo and Teensy Power will only affect wild Pokémon, and will not influence Pokémon hatched from s, caught in raids, or received as gifts. The scale of Pokémon hatched from Eggs is generated like normal and is unaffected by the scale of their parents. Wild Pokémon will always spawn from a scale of 200 to 255 with a uniform distribution. Former Titan Pokémon will always have a set scale of 255.
=====Versions 1.0 & 1.1=====
 	XXXS (0)	XXS (1-30)	XS (31-60)	S (61-99)	M (100-160)	L (161-195)	XL (196-241)	XXL (242-254)	XXXL (255)
Standard 	0.006% 	2.998% 	8.448% 	19.132% 	41.8% 	16.533% 	10.447% 	0.63% 	0.006%
Teensy Lv. 1 	0.781% 	23.438% 	23.438% 	30.469% 	21.875% 	- 	- 	- 	-
Teensy Lv. 2 	1.042% 	31.25% 	31.25% 	36.458% 	- 	- 	- 	- 	-
Teensy Lv. 3 	1.563% 	46.875% 	46.875% 	4.688% 	- 	- 	- 	- 	-
Humungo Lv. 1	- 	- 	- 	- 	25.781% 	27.344% 	35.938% 	10.156% 	0.781%
Humungo Lv. 2	- 	- 	- 	- 	1.042% 	36.458% 	47.917% 	13.542% 	1.042%
Humungo Lv. 3	- 	- 	- 	- 	- 	6.25% 	71.875% 	20.313% 	1.563%
Former Titan 	- 	- 	- 	- 	- 	- 	- 	- 	100%
Wild Tera 	- 	- 	- 	- 	- 	- 	75% 	23.214% 	1.786%
=====Versions 1.2+=====
In the version 1.2 update, the ranges for each size classification were changed, likely to make the ranges even. Pokémon received via Mystery Gift can now be of a specified scale. If the gift Pokémon does not have a specific scale, their scale will no longer be generated using a triangular distribution, instead being randomly selected between 0 and 255,https://twitter.com/Sibuna_Switch/status/1642033720067604480 greatly increasing the chance that they generate a more extreme scale value.
 	XXXS (0)	XXS (1-24)	XS (25-59)	S (60-99)	M (100-155)	L (156-195)	XL (196-230)	XXL (231-254)	XXXL (255)
Standard 	0.006% 	1.962% 	9.115% 	19.501% 	38.832% 	19.501% 	9.115% 	1.962% 	0.006%
Teensy Lv. 1 	0.781% 	18.75% 	27.344% 	31.25% 	21.875% 	- 	- 	- 	-
Teensy Lv. 2 	1.042% 	25% 	36.458% 	37.5% 	- 	- 	- 	- 	-
Teensy Lv. 3 	1.563% 	37.5% 	54.688% 	6.25% 	- 	- 	- 	- 	-
Humungo Lv. 1	- 	- 	- 	- 	21.875% 	31.25% 	27.344% 	18.75% 	0.781%
Humungo Lv. 2	- 	- 	- 	- 	- 	37.5% 	36.458% 	25% 	1.042%
Humungo Lv. 3	- 	- 	- 	- 	- 	6.25% 	54.688% 	37.5% 	1.563%
Former Titan 	- 	- 	- 	- 	- 	- 	- 	- 	100%
Wild Tera 	- 	- 	- 	- 	- 	- 	55.357% 	42.857% 	1.786%
Mystery Gift 	0.391% 	9.375% 	13.672% 	15.625% 	21.875% 	15.625% 	13.672% 	9.375% 	0.391%
======Lock on upgrade======
In the League Club Room at Blueberry Academy, the player can purchase an upgrade for their lock on feature from the Photography Club for 200 BP. Once upgraded, whenever the player locks onto a wild Pokémon with ZL, two different icons can appear next to the targeted Pokémon's name if their scale is less than 59 or greater than 196.https://twitter.com/Sibuna_Switch/status/1753845869596614932
=====Scale locked Pokémon=====
The following Pokémon are scale locked, and when caught, will always have a scale value of 128. If one of the following Pokémon has a scale value other than 128, which may occur if it were transferred from a different game, its in-game model will always appear as if its scale is 128. The Hiker in Mesagoza will still judge Pokémon based on their true scale value, meaning it is still possible for these Pokémon to receive a Jumbo or Mini Mark.
 
 
 
 
 
 
 
 
Bloodmoon Ursaluna
 
 
==In the spin-off games==
===Pokémon GO ===
In , there are five size classes: XXS, XS, M (not named on the user interface), XL, and XXL.https://twitter.com/bmenrigh_pogo/status/1618456354712350720
Height class	Average height proportion (%)	Encounter chance (%)	Encounter chance (odds)
XXS 	49%–50% 	0.4% 	1 in 250
XS 	50%–75% 	2.5% 	1 in 40
M 	75%–125% 	94.2% 	471 in 500
XL 	125%–150% 	2.5% 	1 in 40
XXL 	150%–200% 	0.4% 	1 in 250
The XXL class's upper bound can be either 155%, 175% or 200% depending on species. 's lower bound for XXS is 25% instead of 49%.
 and are instead assigned height classes based on their form: Small Size is XS, Average Size is M, Large Size is XL, and Super Size is XXL. Mega-Evolved Pokémon have their height class calculated relative to their species' height, so often display as being a different height class to their base form.
====Connection with other games====
Pokémon from retain their size when transferred into or . Additionally, if the Pokémon is XXL size in GO, it will be guaranteed to have a scale value of 255, and if it is XXS, it is guaranteed to have a scale value of 0.
Upon the release of Pokémon HOME v3.0.0 on May 30, 2023, there was a bug where XXS size GO Pokémon received a random scale value when sent directly to HOME, randomizing the size values in the same manner as any other Pokémon with height/weight values of 0/0. This was resolved server-side sometime on or before June 15, 2023.https://twitter.com/JoeMerrick/status/1669396152683200529
===Pokémon Sleep===
In , each grows larger when it advances rankings. It begins at its smallest size at Normal, grows larger twice as it gets to Great and Ultra, and reaches its maximum size when it gets to Master.
===Pokémon: Magikarp Jump===
In Pokémon: Magikarp Jump, Magikarp grow larger upon leveling up.
==Related articles==
*Giant Pokémon
==References==
Category:Game mechanics
it:Variazione di altezza e peso
ja:サイズ
zh:尺寸