HomePokédex › Sandy Wormadam
#0413 · Generation IV · form of Wormadam

Sandy Wormadam

Bug / Ground · Bagworm Pokémon — first seen in Generation IV.

Showing the official games. Pick a ROM hack to see how it changes this Pokémon, or compare all of them.

Base stats

HP60
Attack79
Defense105
Sp. Attack59
Sp. Defense85
Speed36
Total424
StatBaseMinMax
HP60230324
Attack79146282
Defense105193339
Sp. Attack59110238
Sp. Defense85157295
Speed3669188

Min and max are at level 100: the minimum is 0 IVs, 0 EVs and a hindering nature, the maximum 31 IVs, 252 EVs and a beneficial nature. Shedinja's HP is always 1 whatever the formula says.

Type defences

Damage Sandy Wormadam takes from each attacking type.

×2
FlyingFireWaterIce
×½
FightingPoisonGround
×0
Electric
×1
NormalRockBugGhostSteelGrassPsychicDragonDarkFairy

Evolution

Methods are the current official ones. A ROM hack may change them — trade evolutions especially; the guide table below says which do.

In the ROM hacks it evolves differently

Each guide's own line, in the words its creator published.

Other forms

Moves by official game

Level-up, TM/HM, tutor and egg moves exactly as each game has them. The newest game this site covers is open; the rest fold out.

Ultra Sun / Ultra Moon19 level-up · 30 TM/HM · 11 tutor

Level-up

LvMoveTypeCat.PowerAcc.PP
Quiver DanceBugStatus20
1TackleNormalPhysical40100%35
1ProtectNormalStatus10
1Sucker PunchDarkPhysical70100%5
1Bug BiteBugPhysical60100%20
1Quiver DanceBugStatus20
10ProtectNormalStatus10
15Bug BiteBugPhysical60100%20
20Hidden PowerNormalSpecial60100%15
23ConfusionPsychicSpecial50100%25
26Rock BlastRockPhysical2590%10
29HardenNormalStatus30
32PsybeamPsychicSpecial65100%20
35CaptivateNormalStatus100%20
38FlailNormalPhysical100%15
41AttractNormalStatus100%15
44PsychicPsychicSpecial90100%10
47FissureGroundPhysical30%5
50Bug BuzzBugSpecial90100%10

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM06ToxicPoisonStatus90%10
TM09VenoshockPoisonSpecial65100%10
TM10Hidden PowerNormalSpecial60100%15
TM100ConfideNormalStatus20
TM11Sunny DayFireStatus5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus10
TM18Rain DanceWaterStatus5
TM20SafeguardNormalStatus25
TM21FrustrationNormalPhysical100%20
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical100%20
TM29PsychicPsychicSpecial90100%10
TM30Shadow BallGhostSpecial80100%15
TM32Double TeamNormalStatus15
TM37SandstormRockStatus10
TM39Rock TombRockPhysical6095%15
TM42FacadeNormalPhysical70100%20
TM44RestPsychicStatus5
TM45AttractNormalStatus100%15
TM46ThiefDarkPhysical60100%25
TM48RoundNormalSpecial60100%15
TM68Giga ImpactNormalPhysical15090%5
TM77Psych UpNormalStatus10
TM78BulldozeGroundPhysical60100%20
TM83InfestationBugSpecial20100%20
TM85Dream EaterPsychicSpecial100100%15
TM87SwaggerNormalStatus85%15
TM88Sleep TalkNormalStatus10
TM90SubstituteNormalStatus10

Move tutor

MoveTypeCat.PowerAcc.PP
SnoreNormalSpecial50100%15
UproarNormalSpecial90100%10
EndeavorNormalPhysical100%5
Skill SwapPsychicStatus10
Signal BeamBugSpecial75100%15
Earth PowerGroundSpecial90100%10
Stealth RockRockStatus20
Bug BiteBugPhysical60100%20
TelekinesisPsychicStatus15
Ally SwitchPsychicStatus15
ElectrowebElectricSpecial5595%15
Sun / Moon19 level-up · 30 TM/HM

Level-up

LvMoveTypeCat.PowerAcc.PP
Quiver DanceBugStatus20
1TackleNormalPhysical40100%35
1ProtectNormalStatus10
1Sucker PunchDarkPhysical70100%5
1Bug BiteBugPhysical60100%20
1Quiver DanceBugStatus20
10ProtectNormalStatus10
15Bug BiteBugPhysical60100%20
20Hidden PowerNormalSpecial60100%15
23ConfusionPsychicSpecial50100%25
26Rock BlastRockPhysical2590%10
29HardenNormalStatus30
32PsybeamPsychicSpecial65100%20
35CaptivateNormalStatus100%20
38FlailNormalPhysical100%15
41AttractNormalStatus100%15
44PsychicPsychicSpecial90100%10
47FissureGroundPhysical30%5
50Bug BuzzBugSpecial90100%10

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM06ToxicPoisonStatus90%10
TM09VenoshockPoisonSpecial65100%10
TM10Hidden PowerNormalSpecial60100%15
TM100ConfideNormalStatus20
TM11Sunny DayFireStatus5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus10
TM18Rain DanceWaterStatus5
TM20SafeguardNormalStatus25
TM21FrustrationNormalPhysical100%20
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical100%20
TM29PsychicPsychicSpecial90100%10
TM30Shadow BallGhostSpecial80100%15
TM32Double TeamNormalStatus15
TM37SandstormRockStatus10
TM39Rock TombRockPhysical6095%15
TM42FacadeNormalPhysical70100%20
TM44RestPsychicStatus5
TM45AttractNormalStatus100%15
TM46ThiefDarkPhysical60100%25
TM48RoundNormalSpecial60100%15
TM68Giga ImpactNormalPhysical15090%5
TM77Psych UpNormalStatus10
TM78BulldozeGroundPhysical60100%20
TM83InfestationBugSpecial20100%20
TM85Dream EaterPsychicSpecial100100%15
TM87SwaggerNormalStatus85%15
TM88Sleep TalkNormalStatus10
TM90SubstituteNormalStatus10
Omega Ruby / Alpha Sapphire13 level-up · 34 TM/HM · 9 tutor

Level-up

LvMoveTypeCat.PowerAcc.PP
1TackleNormalPhysical40100%35
10ProtectNormalStatus10
15Bug BiteBugPhysical60100%20
20Hidden PowerNormalSpecial60100%15
23ConfusionPsychicSpecial50100%25
26Rock BlastRockPhysical2590%10
29HardenNormalStatus30
32PsybeamPsychicSpecial65100%20
35CaptivateNormalStatus100%20
38FlailNormalPhysical100%15
41AttractNormalStatus100%15
44PsychicPsychicSpecial90100%10
47FissureGroundPhysical30%5

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM06ToxicPoisonStatus90%10
TM09VenoshockPoisonSpecial65100%10
TM10Hidden PowerNormalSpecial60100%15
TM100ConfideNormalStatus20
TM11Sunny DayFireStatus5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus10
TM18Rain DanceWaterStatus5
TM20SafeguardNormalStatus25
TM21FrustrationNormalPhysical100%20
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical100%20
TM28DigGroundPhysical80100%10
TM29PsychicPsychicSpecial90100%10
TM30Shadow BallGhostSpecial80100%15
TM32Double TeamNormalStatus15
TM37SandstormRockStatus10
TM39Rock TombRockPhysical6095%15
TM42FacadeNormalPhysical70100%20
TM44RestPsychicStatus5
TM45AttractNormalStatus100%15
TM46ThiefDarkPhysical60100%25
TM48RoundNormalSpecial60100%15
TM68Giga ImpactNormalPhysical15090%5
TM70FlashNormalStatus100%20
TM76Struggle BugBugSpecial50100%20
TM77Psych UpNormalStatus10
TM78BulldozeGroundPhysical60100%20
TM83InfestationBugSpecial20100%20
TM85Dream EaterPsychicSpecial100100%15
TM87SwaggerNormalStatus85%15
TM88Sleep TalkNormalStatus10
TM90SubstituteNormalStatus10
TM94Secret PowerNormalPhysical70100%20

Move tutor

MoveTypeCat.PowerAcc.PP
SnoreNormalSpecial50100%15
UproarNormalSpecial90100%10
EndeavorNormalPhysical100%5
Skill SwapPsychicStatus10
Signal BeamBugSpecial75100%15
Earth PowerGroundSpecial90100%10
Stealth RockRockStatus20
Bug BiteBugPhysical60100%20
ElectrowebElectricSpecial5595%15
X / Y13 level-up · 33 TM/HM

Level-up

LvMoveTypeCat.PowerAcc.PP
1TackleNormalPhysical40100%35
10ProtectNormalStatus10
15Bug BiteBugPhysical60100%20
20Hidden PowerNormalSpecial60100%15
23ConfusionPsychicSpecial50100%25
26Rock BlastRockPhysical2590%10
29HardenNormalStatus30
32PsybeamPsychicSpecial65100%20
35CaptivateNormalStatus100%20
38FlailNormalPhysical100%15
41AttractNormalStatus100%15
44PsychicPsychicSpecial90100%10
47FissureGroundPhysical30%5

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM06ToxicPoisonStatus90%10
TM09VenoshockPoisonSpecial65100%10
TM10Hidden PowerNormalSpecial60100%15
TM100ConfideNormalStatus20
TM11Sunny DayFireStatus5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus10
TM18Rain DanceWaterStatus5
TM20SafeguardNormalStatus25
TM21FrustrationNormalPhysical100%20
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical100%20
TM28DigGroundPhysical80100%10
TM29PsychicPsychicSpecial90100%10
TM30Shadow BallGhostSpecial80100%15
TM32Double TeamNormalStatus15
TM37SandstormRockStatus10
TM39Rock TombRockPhysical6095%15
TM42FacadeNormalPhysical70100%20
TM44RestPsychicStatus5
TM45AttractNormalStatus100%15
TM46ThiefDarkPhysical60100%25
TM48RoundNormalSpecial60100%15
TM68Giga ImpactNormalPhysical15090%5
TM70FlashNormalStatus100%20
TM76Struggle BugBugSpecial50100%20
TM77Psych UpNormalStatus10
TM78BulldozeGroundPhysical60100%20
TM83InfestationBugSpecial20100%20
TM85Dream EaterPsychicSpecial100100%15
TM87SwaggerNormalStatus85%15
TM88Sleep TalkNormalStatus10
TM90SubstituteNormalStatus10
Black 2 / White 213 level-up · 30 TM/HM · 10 tutor

Level-up

LvMoveTypeCat.PowerAcc.PP
1TackleNormalPhysical40100%35
10ProtectNormalStatus10
15Bug BiteBugPhysical60100%20
20Hidden PowerNormalSpecial60100%15
23ConfusionPsychicSpecial50100%25
26Rock BlastRockPhysical2590%10
29HardenNormalStatus30
32PsybeamPsychicSpecial65100%20
35CaptivateNormalStatus100%20
38FlailNormalPhysical100%15
41AttractNormalStatus100%15
44PsychicPsychicSpecial90100%10
47FissureGroundPhysical30%5

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM06ToxicPoisonStatus90%10
TM09VenoshockPoisonSpecial65100%10
TM10Hidden PowerNormalSpecial60100%15
TM11Sunny DayFireStatus5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus10
TM18Rain DanceWaterStatus5
TM20SafeguardNormalStatus25
TM21FrustrationNormalPhysical100%20
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical100%20
TM28DigGroundPhysical80100%10
TM29PsychicPsychicSpecial90100%10
TM30Shadow BallGhostSpecial80100%15
TM32Double TeamNormalStatus15
TM37SandstormRockStatus10
TM39Rock TombRockPhysical6095%15
TM42FacadeNormalPhysical70100%20
TM44RestPsychicStatus5
TM45AttractNormalStatus100%15
TM46ThiefDarkPhysical60100%25
TM48RoundNormalSpecial60100%15
TM68Giga ImpactNormalPhysical15090%5
TM70FlashNormalStatus100%20
TM76Struggle BugBugSpecial50100%20
TM77Psych UpNormalStatus10
TM78BulldozeGroundPhysical60100%20
TM85Dream EaterPsychicSpecial100100%15
TM87SwaggerNormalStatus85%15
TM90SubstituteNormalStatus10

Move tutor

MoveTypeCat.PowerAcc.PP
SnoreNormalSpecial50100%15
Sleep TalkNormalStatus10
UproarNormalSpecial90100%10
EndeavorNormalPhysical100%5
Skill SwapPsychicStatus10
Signal BeamBugSpecial75100%15
Earth PowerGroundSpecial90100%10
Stealth RockRockStatus20
Bug BiteBugPhysical60100%20
ElectrowebElectricSpecial5595%15
Black / White13 level-up · 30 TM/HM

Level-up

LvMoveTypeCat.PowerAcc.PP
1TackleNormalPhysical40100%35
10ProtectNormalStatus10
15Bug BiteBugPhysical60100%20
20Hidden PowerNormalSpecial60100%15
23ConfusionPsychicSpecial50100%25
26Rock BlastRockPhysical2590%10
29HardenNormalStatus30
32PsybeamPsychicSpecial65100%20
35CaptivateNormalStatus100%20
38FlailNormalPhysical100%15
41AttractNormalStatus100%15
44PsychicPsychicSpecial90100%10
47FissureGroundPhysical30%5

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM06ToxicPoisonStatus90%10
TM09VenoshockPoisonSpecial65100%10
TM10Hidden PowerNormalSpecial60100%15
TM11Sunny DayFireStatus5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus10
TM18Rain DanceWaterStatus5
TM20SafeguardNormalStatus25
TM21FrustrationNormalPhysical100%20
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical100%20
TM28DigGroundPhysical80100%10
TM29PsychicPsychicSpecial90100%10
TM30Shadow BallGhostSpecial80100%15
TM32Double TeamNormalStatus15
TM37SandstormRockStatus10
TM39Rock TombRockPhysical6095%15
TM42FacadeNormalPhysical70100%20
TM44RestPsychicStatus5
TM45AttractNormalStatus100%15
TM46ThiefDarkPhysical60100%25
TM48RoundNormalSpecial60100%15
TM68Giga ImpactNormalPhysical15090%5
TM70FlashNormalStatus100%20
TM76Struggle BugBugSpecial50100%20
TM77Psych UpNormalStatus10
TM78BulldozeGroundPhysical60100%20
TM85Dream EaterPsychicSpecial100100%15
TM87SwaggerNormalStatus85%15
TM90SubstituteNormalStatus10
HeartGold / SoulSilver13 level-up · 32 TM/HM · 10 tutor

Level-up

LvMoveTypeCat.PowerAcc.PP
1TackleNormalPhysical40100%35
10ProtectNormalStatus10
15Bug BiteBugPhysical60100%20
20Hidden PowerNormalSpecial60100%15
23ConfusionPsychicSpecial50100%25
26Rock BlastRockPhysical2590%10
29HardenNormalStatus30
32PsybeamPsychicSpecial65100%20
35CaptivateNormalStatus100%20
38FlailNormalPhysical100%15
41AttractNormalStatus100%15
44PsychicPsychicSpecial90100%10
47FissureGroundPhysical30%5

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM06ToxicPoisonStatus90%10
TM10Hidden PowerNormalSpecial60100%15
TM11Sunny DayFireStatus5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus10
TM18Rain DanceWaterStatus5
TM20SafeguardNormalStatus25
TM21FrustrationNormalPhysical100%20
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical100%20
TM28DigGroundPhysical80100%10
TM29PsychicPsychicSpecial90100%10
TM30Shadow BallGhostSpecial80100%15
TM32Double TeamNormalStatus15
TM37SandstormRockStatus10
TM39Rock TombRockPhysical6095%15
TM42FacadeNormalPhysical70100%20
TM43Secret PowerNormalPhysical70100%20
TM44RestPsychicStatus5
TM45AttractNormalStatus100%15
TM46ThiefDarkPhysical60100%25
TM48Skill SwapPsychicStatus10
TM58EndureNormalStatus10
TM68Giga ImpactNormalPhysical15090%5
TM70FlashNormalStatus100%20
TM77Psych UpNormalStatus10
TM78CaptivateNormalStatus100%20
TM82Sleep TalkNormalStatus10
TM83Natural GiftNormalPhysical100%15
TM85Dream EaterPsychicSpecial100100%15
TM87SwaggerNormalStatus85%15
TM90SubstituteNormalStatus10

Move tutor

MoveTypeCat.PowerAcc.PP
String ShotBugStatus95%40
SnoreNormalSpecial50100%15
Mud-SlapGroundSpecial20100%10
RolloutRockPhysical3090%20
UproarNormalSpecial90100%10
EndeavorNormalPhysical100%5
Signal BeamBugSpecial75100%15
Sucker PunchDarkPhysical70100%5
Earth PowerGroundSpecial90100%10
Bug BiteBugPhysical60100%20
Platinum13 level-up · 32 TM/HM · 8 tutor

Level-up

LvMoveTypeCat.PowerAcc.PP
1TackleNormalPhysical40100%35
10ProtectNormalStatus10
15Bug BiteBugPhysical60100%20
20Hidden PowerNormalSpecial60100%15
23ConfusionPsychicSpecial50100%25
26Rock BlastRockPhysical2590%10
29HardenNormalStatus30
32PsybeamPsychicSpecial65100%20
35CaptivateNormalStatus100%20
38FlailNormalPhysical100%15
41AttractNormalStatus100%15
44PsychicPsychicSpecial90100%10
47FissureGroundPhysical30%5

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM06ToxicPoisonStatus90%10
TM10Hidden PowerNormalSpecial60100%15
TM11Sunny DayFireStatus5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus10
TM18Rain DanceWaterStatus5
TM20SafeguardNormalStatus25
TM21FrustrationNormalPhysical100%20
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical100%20
TM28DigGroundPhysical80100%10
TM29PsychicPsychicSpecial90100%10
TM30Shadow BallGhostSpecial80100%15
TM32Double TeamNormalStatus15
TM37SandstormRockStatus10
TM39Rock TombRockPhysical6095%15
TM42FacadeNormalPhysical70100%20
TM43Secret PowerNormalPhysical70100%20
TM44RestPsychicStatus5
TM45AttractNormalStatus100%15
TM46ThiefDarkPhysical60100%25
TM48Skill SwapPsychicStatus10
TM58EndureNormalStatus10
TM68Giga ImpactNormalPhysical15090%5
TM70FlashNormalStatus100%20
TM77Psych UpNormalStatus10
TM78CaptivateNormalStatus100%20
TM82Sleep TalkNormalStatus10
TM83Natural GiftNormalPhysical100%15
TM85Dream EaterPsychicSpecial100100%15
TM87SwaggerNormalStatus85%15
TM90SubstituteNormalStatus10

Move tutor

MoveTypeCat.PowerAcc.PP
SnoreNormalSpecial50100%15
Mud-SlapGroundSpecial20100%10
RolloutRockPhysical3090%20
UproarNormalSpecial90100%10
EndeavorNormalPhysical100%5
Signal BeamBugSpecial75100%15
Sucker PunchDarkPhysical70100%5
Earth PowerGroundSpecial90100%10
Diamond / Pearl12 level-up · 32 TM/HM

Level-up

LvMoveTypeCat.PowerAcc.PP
1TackleNormalPhysical40100%35
10ProtectNormalStatus10
20Hidden PowerNormalSpecial60100%15
23ConfusionPsychicSpecial50100%25
26Rock BlastRockPhysical2590%10
29HardenNormalStatus30
32PsybeamPsychicSpecial65100%20
35CaptivateNormalStatus100%20
38FlailNormalPhysical100%15
41AttractNormalStatus100%15
44PsychicPsychicSpecial90100%10
47FissureGroundPhysical30%5

TM & HM

TMMoveTypeCat.PowerAcc.PP
TM06ToxicPoisonStatus90%10
TM10Hidden PowerNormalSpecial60100%15
TM11Sunny DayFireStatus5
TM15Hyper BeamNormalSpecial15090%5
TM17ProtectNormalStatus10
TM18Rain DanceWaterStatus5
TM20SafeguardNormalStatus25
TM21FrustrationNormalPhysical100%20
TM26EarthquakeGroundPhysical100100%10
TM27ReturnNormalPhysical100%20
TM28DigGroundPhysical80100%10
TM29PsychicPsychicSpecial90100%10
TM30Shadow BallGhostSpecial80100%15
TM32Double TeamNormalStatus15
TM37SandstormRockStatus10
TM39Rock TombRockPhysical6095%15
TM42FacadeNormalPhysical70100%20
TM43Secret PowerNormalPhysical70100%20
TM44RestPsychicStatus5
TM45AttractNormalStatus100%15
TM46ThiefDarkPhysical60100%25
TM48Skill SwapPsychicStatus10
TM58EndureNormalStatus10
TM68Giga ImpactNormalPhysical15090%5
TM70FlashNormalStatus100%20
TM77Psych UpNormalStatus10
TM78CaptivateNormalStatus100%20
TM82Sleep TalkNormalStatus10
TM83Natural GiftNormalPhysical100%15
TM85Dream EaterPsychicSpecial100100%15
TM87SwaggerNormalStatus85%15
TM90SubstituteNormalStatus10

Where to find it in the official games

Not obtainable in the wild in any of the 16 official games this site covers. In those games it has to be evolved, traded or bred — or it belongs to a game whose data is not here yet.

Compare official Sandy Wormadam with the ROM hacks →

In the 10 guides that include it

Changed in 9 of 10 guides: retyped in 9, stats in 9, abilities in 5.

Every ROM hack on this site that has Sandy Wormadam, and what it did to it. Guides that changed something are first. Click one for that version's full page — locations, moveset and TMs.

GuideTypeTotalAbilities
UnboundChangedBugGrassBugGround424
+20 Attack, +20 Defense, -20 Sp. Atk, -20 Sp. Def
Technician, Overcoat
+ Technician − Anticipation
Emerald RogueChangedBugGrassBugGround424
+20 Attack, +20 Defense, -20 Sp. Atk, -20 Sp. Def
Anticipation, Overcoat
Radical RedChangedBugGrassBugGround424
+20 Defense, -20 Sp. Def
Overcoat
− Anticipation
Sword and Shield Ultimate PlusChangedBugGrassBugGround424
+20 Attack, +20 Defense, -20 Sp. Atk, -20 Sp. Def
Anticipation, Overcoat
Elite ReduxChangedBugGrassBugGround468 +44
+24 HP, +40 Attack, +20 Defense, -20 Sp. Atk, -20 Sp. Def
Anticipation, Rock Head, Overcoat
Inclement EmeraldChangedBugGrassBugGround424
+20 Attack, +20 Defense, -20 Sp. Atk, -20 Sp. Def
Anticipation, Overcoat
Pokémon Emerald ImperiumChangedBugGrassBugGround424
+20 Defense, -20 Sp. Def
Overcoat
− Anticipation
Pokémon Platinum KaizoChangedBugGrassBugGround424
+20 Attack, +20 Defense, -20 Sp. Atk, -20 Sp. Def
Snow Cloak
+ Snow Cloak − Anticipation, Overcoat
Pokémon SoothingSilverChangedBugGrassBugGround424
+20 Attack, +20 Defense, -20 Sp. Atk, -20 Sp. Def
Anticipation, Dry Skin
+ Dry Skin − Overcoat
Pokémon R.O.W.EUnchangedBugGround424Anticipation, Overcoat

Pokédex entries

What each game says about it, in the games' own words.

DiamondWhen BURMY evolved, its cloak became a part of this Pokémon’s body. The cloak is never shed.
Pearl / X / Omega RubyIts appearance changes depending on where it evolved. The materials on hand become a part of its body.
Platinum / Black / White / Black 2 / White 2When evolving, its body takes in surrounding materials. As a result, there are many body variations.
HeartGold / SoulSilverIt is said that a WORMADAM that evolves on a cold day will have a thicker cloak.
Y / Alpha SapphireWhen Burmy evolved, its cloak became a part of this Pokémon’s body. The cloak is never shed.

Names in other languages

Japaneseミノマダム
Japanese (Rōmaji)Minomadam
GermanBurmadame
FrenchCheniselle
SpanishWormadam
ItalianWormadam
Korean도롱마담
Chinese (Simplified)结草贵妇
Chinese (Traditional)結草貴婦

Official data here is present-day reference data from PokéAPI, not a snapshot of any one game's era — the Fairy type and hidden abilities arrived partway through the series, so a difference against an older game can belong to the series rather than to that ROM hack.