10% more Sp. Defense and 10% less Sp. Attack. Careful suits Pokemon that rely on physical attacks or status moves while tanking special hits. Over in Omega Ruby & Alpha Sapphire, Ho-Oh is one of the most popular Careful users, alongside Giratina and Skarmory. Mega Evolution reshuffles stats, but Careful's Sp. Defense boost applies on top. Mega walls in Omega Ruby & Alpha Sapphire appreciate the extra bulk.
Careful raises Sp. Defense by 10% and lowers Sp. Attack by 10%. Special walls that rely on physical or status moves. 100 Pokemon competitively run this nature.
SHOWINGRegional27
| # | Pokemon | Tier | Role | Ability | +SpD | -SpA | Spe |
|---|---|---|---|---|---|---|---|
| 1 | Ho-Oh FIRE | S | Bulky Support | Regenerator | 154+20 | 110-13 | 90 |
| 2 | Giratina GHOSTDRAGON | S | Bulky Support | Pressure | 120+17 | 100-12 | 90 |
| 3 | Skarmory STEEL | A | Bulky Support | Keeneye | 70+12 | 40-6 | 70 |
| 4 | Uxie PSYCHIC | A | Bulky Support | Levitate | 130+18 | 75-10 | 95 |
| 5 | Jirachi STEELPSYCHIC | A | Bulky Support | Serenegrace | 100+15 | 100-12 | 100 |
| 6 | Snorlax NORMAL | A | Bulky Support | Thickfat | 110+16 | 65-9 | 30 |
| 7 | Clefable FAIRY | A | Bulky Support | Magic Guard | 90+14 | 95-12 | 60 |
| 8 | Mew PSYCHIC | A | Bulky Support | Synchronize | 100+15 | 100-12 | 100 |
| 9 | Gyarados WATER | A | Bulky Support | Intimidate | 100+15 | 60-8 | 81 |
| 10 | Rhyperior GROUNDROCK | A | Bulky Support | Solidrock | 55+10 | 55-8 | 40 |
| 11 | Bronzong STEELPSYCHIC | A | Bulky Support | Levitate | 116+16 | 79-10 | 33 |
| 12 | Alomomola WATER | A | Bulky Support | Regenerator | 45+9 | 40-6 | 65 |
| 13 | Zygarde DRAGONGROUND | A | Bulky Support | Aurabreak | 95+14 | 81-11 | 95 |
| 14 | Regirock ROCK | A | Bulky Support | Sturdy | 100+15 | 50-7 | 50 |
| 15 | Hitmontop FIGHTING | A | Bulky Support | Intimidate | 110+16 | 35-6 | 70 |
| 16 | Rhydon GROUNDROCK | A | Bulky Support | Lightningrod | 45+9 | 45-7 | 40 |
| 17 | Vullaby DARK | A | Bulky Support | Weakarmor | 65+11 | 45-7 | 60 |
| 18 | Sandslash GROUND | A | Bulky Support | Sandrush | 55+10 | 45-7 | 65 |
| 19 | Ferrothorn GRASSSTEEL | B | Bulky Support | Iron Barbs | 116+16 | 54-8 | 20 |
| 20 | Gliscor GROUND | B | Bulky Support | Poisonheal | 75+12 | 45-7 | 95 |
| 21 | Forretress BUGSTEEL | B | Bulky Support | Sturdy | 60+11 | 60-8 | 40 |
| 22 | Hippowdon GROUND | B | Bulky Support | Sand Stream | 72+12 | 68-9 | 47 |
| 23 | Registeel STEEL | B | Bulky Support | Clearbody | 150+20 | 75-10 | 50 |
| 24 | Dusknoir GHOST | B | Bulky Support | Pressure | 135+18 | 65-9 | 45 |
| 25 | Malamar DARKPSYCHIC | B | Bulky Support | Contrary | 75+12 | 68-9 | 73 |
| 26 | Shuckle BUGROCK | B | Bulky Support | Sturdy | 230+28 | 10-3 | 5 |
| 27 | Scrafty DARKFIGHTING | B | Bulky Support | Shedskin | 115+16 | 45-7 | 58 |
| 28 | Umbreon DARK | B | Bulky Support | Synchronize | 130+18 | 60-8 | 65 |
| 29 | Gigalith ROCK | B | Bulky Support | Sand Stream | 80+13 | 60-8 | 25 |
| 30 | Golurk GROUNDGHOST | B | Physical Tank | Noguard | 80+13 | 55-8 | 55 |
| 31 | Chansey NORMAL | B | Bulky Support | Healer | 105+15 | 35-6 | 50 |
| 32 | Mandibuzz DARK | B | Bulky Support | Overcoat | 95+14 | 55-8 | 80 |
| 33 | Blaziken FIREFIGHTING | B | Bulky Support | Speed Boost | 70+12 | 110-13 | 80 |
| 34 | Eelektross ELECTRIC | B | Bulky Support | Levitate | 80+13 | 105-13 | 50 |
| 35 | Bastiodon ROCKSTEEL | B | Bulky Support | Soundproof | 138+19 | 47-7 | 30 |
| 36 | Swampert WATERGROUND | B | Bulky Support | Torrent | 90+14 | 85-11 | 60 |
| 37 | Primeape FIGHTING | B | Bulky Support | Defiant | 70+12 | 60-8 | 95 |
| 38 | Torterra GRASSGROUND | B | Bulky Support | Shellarmor | 85+13 | 75-10 | 56 |
| 39 | Gastrodon WATERGROUND | B | Bulky Support | Stickyhold | 82+13 | 92-12 | 39 |
| 40 | Tentacruel WATERPOISON | B | Bulky Support | Clearbody | 120+17 | 80-10 | 100 |
| 41 | Dusclops GHOST | B | Bulky Support | Pressure | 130+18 | 60-8 | 25 |
| 42 | Avalugg ICE | B | Bulky Support | Sturdy | 46+9 | 44-7 | 28 |
| 43 | Cloyster WATERICE | B | Bulky Support | Skilllink | 45+9 | 85-11 | 70 |
| 44 | Ursaring NORMAL | B | Bulky Support | Guts | 75+12 | 75-10 | 55 |
| 45 | Hitmonchan FIGHTING | B | Bulky Support | Ironfist | 110+16 | 35-6 | 76 |
| 46 | Altaria DRAGON | B | Bulky Support | Natural Cure | 105+15 | 70-9 | 80 |
| 47 | Skuntank POISONDARK | B | Bulky Support | Aftermath | 61+11 | 71-10 | 84 |
| 48 | Hariyama FIGHTING | B | Physical Tank | Thickfat | 60+11 | 40-6 | 50 |
| 49 | Braviary NORMAL | B | Bulky Support | Defiant | 75+12 | 57-8 | 80 |
| 50 | Muk POISON | B | Bulky Support | Poisontouch | 100+15 | 65-9 | 50 |
| 51 | Regigigas NORMAL | B | Bulky Support | Slowstart | 110+16 | 80-10 | 100 |
| 52 | Murkrow DARK | B | Bulky Support | Prankster | 42+9 | 85-11 | 91 |
| 53 | Meowstic PSYCHIC | B | Bulky Support | Prankster | 81+13 | 83-11 | 104 |
| 54 | Probopass ROCKSTEEL | B | Bulky Support | Sturdy | 150+20 | 75-10 | 40 |
| 55 | Sableye DARKGHOST | C | Bulky Support | Prankster | 65+11 | 65-9 | 50 |
| 56 | Chespin GRASS | C | Bulky Support | Bulletproof | 45+9 | 48-7 | 38 |
| 57 | Seismitoad WATERGROUND | C | Bulky Support | Waterabsorb | 75+12 | 85-11 | 74 |
| 58 | Illumise BUG | C | Bulky Support | Prankster | 85+13 | 73-10 | 85 |
| 59 | Piloswine ICEGROUND | C | Bulky Support | Thickfat | 60+11 | 60-8 | 50 |
| 60 | Volbeat BUG | C | Bulky Support | Prankster | 85+13 | 47-7 | 85 |
| 61 | Blastoise WATER | C | Bulky Support | Torrent | 105+15 | 85-11 | 78 |
| 62 | Claydol GROUNDPSYCHIC | C | Bulky Support | Levitate | 120+17 | 70-9 | 75 |
| 63 | Audino NORMAL | C | Bulky Support | Regenerator | 86+13 | 60-8 | 50 |
| 64 | Cradily ROCKGRASS | C | Bulky Support | Suctioncups | 107+15 | 81-11 | 43 |
| 65 | Bergmite ICE | C | Bulky Support | Sturdy | 35+8 | 32-6 | 28 |
| 66 | Garbodor POISON | C | Bulky Support | Aftermath | 82+13 | 60-8 | 75 |
| 67 | Lickilicky NORMAL | C | Bulky Support | Owntempo | 95+14 | 80-10 | 50 |
| 68 | Drapion POISONDARK | C | Bulky Support | Battlearmor | 75+12 | 60-8 | 95 |
| 69 | Pachirisu ELECTRIC | C | Bulky Support | Voltabsorb | 90+14 | 45-7 | 95 |
| 70 | Dunsparce NORMAL | C | Bulky Support | Serenegrace | 65+11 | 65-9 | 45 |
| 71 | Banette GHOST | C | Bulky Support | Cursedbody | 63+11 | 83-11 | 65 |
| 72 | Druddigon DRAGON | C | Bulky Support | Rough Skin | 90+14 | 60-8 | 48 |
| 73 | Tangrowth GRASS | C | Bulky Support | Chlorophyll | 50+10 | 110-13 | 50 |
| 74 | Steelix STEELGROUND | C | Bulky Support | Sturdy | 65+11 | 55-8 | 30 |
| 75 | Gogoat GRASS | C | Bulky Support | Sapsipper | 81+13 | 97-12 | 68 |
| 76 | Granbull FAIRY | C | Bulky Support | Intimidate | 60+11 | 60-8 | 45 |
| 77 | Flareon FIRE | C | Bulky Support | Flashfire | 110+16 | 95-12 | 65 |
| 78 | Vespiquen BUG | C | Bulky Support | Pressure | 102+15 | 80-10 | 40 |
| 79 | Trevenant GHOSTGRASS | C | Bulky Support | Harvest | 82+13 | 65-9 | 56 |
| 80 | Leavanny BUGGRASS | C | Physical Attacker | Chlorophyll | 80+13 | 70-9 | 92 |
| 81 | Poliwrath WATERFIGHTING | C | Bulky Support | Waterabsorb | 90+14 | 70-9 | 70 |
| 82 | Magikarp WATER | C | Bulky Support | Swiftswim | 20+7 | 15-4 | 80 |
| 83 | Tropius GRASS | C | Bulky Support | Harvest | 87+13 | 72-10 | 51 |
| 84 | Carracosta WATERROCK | C | Bulky Support | Solidrock | 65+11 | 83-11 | 32 |
| 85 | Wartortle WATER | C | Bulky Support | Raindish | 80+13 | 65-9 | 58 |
| 86 | Parasect BUGGRASS | C | Bulky Support | Dryskin | 80+13 | 60-8 | 30 |
| 87 | Stoutland NORMAL | C | Utility | Intimidate | 90+14 | 45-7 | 80 |
| 88 | Escavalier BUGSTEEL | C | Bulky Support | Shellarmor | 105+15 | 60-8 | 20 |
| 89 | Eelektrik ELECTRIC | C | Bulky Support | Levitate | 70+12 | 75-10 | 40 |
| 90 | Meganium GRASS | C | Bulky Support | Overgrow | 100+15 | 83-11 | 80 |
| 91 | Fletchinder FIRE | C | Bulky Support | Flame Body | 52+10 | 56-8 | 84 |
| 92 | Azurill NORMALFAIRY | C | Bulky Support | Huge Power | 40+9 | 20-4 | 20 |
| 93 | Hypno PSYCHIC | C | Bulky Support | Insomnia | 115+16 | 73-10 | 67 |
| 94 | Crustle BUGROCK | C | Physical Tank | Sturdy | 75+12 | 65-9 | 45 |
| 95 | Onix ROCKGROUND | C | Bulky Support | Weakarmor | 45+9 | 30-5 | 70 |
| 96 | Swablu NORMAL | D | Bulky Support | Natural Cure | 75+12 | 40-6 | 50 |
| 97 | Eevee NORMAL | D | Bulky Support | Adaptability | 65+11 | 45-7 | 55 |
| 98 | Gothorita PSYCHIC | D | Bulky Support | Shadowtag | 85+13 | 75-10 | 55 |
| 99 | Skiploom GRASS | D | Bulky Support | Infiltrator | 65+11 | 45-7 | 80 |
| 100 | Starly NORMAL | D | Bulky Support | Keeneye | 30+8 | 30-5 | 60 |
Ho-Oh
FIRE
Role
Bulky SupportAbility
Regenerator+SpD
154 +20Spe
90Giratina
GHOST DRAGON
Role
Bulky SupportAbility
Pressure+SpD
120 +17Spe
90Skarmory
STEEL
Role
Bulky SupportAbility
Keeneye+SpD
70 +12Spe
70Uxie
PSYCHIC
Role
Bulky SupportAbility
Levitate+SpD
130 +18Spe
95Jirachi
STEEL PSYCHIC
Role
Bulky SupportAbility
Serenegrace+SpD
100 +15Spe
100Snorlax
NORMAL
Role
Bulky SupportAbility
Thickfat+SpD
110 +16Spe
30Clefable
FAIRY
Role
Bulky SupportAbility
Magic Guard+SpD
90 +14Spe
60Mew
PSYCHIC
Role
Bulky SupportAbility
Synchronize+SpD
100 +15Spe
100Gyarados
WATER
Role
Bulky SupportAbility
Intimidate+SpD
100 +15Spe
81Rhyperior
GROUND ROCK
Role
Bulky SupportAbility
Solidrock+SpD
55 +10Spe
40Bronzong
STEEL PSYCHIC
Role
Bulky SupportAbility
Levitate+SpD
116 +16Spe
33Alomomola
WATER
Role
Bulky SupportAbility
Regenerator+SpD
45 +9Spe
65Zygarde
DRAGON GROUND
Role
Bulky SupportAbility
Aurabreak+SpD
95 +14Spe
95Regirock
ROCK
Role
Bulky SupportAbility
Sturdy+SpD
100 +15Spe
50Hitmontop
FIGHTING
Role
Bulky SupportAbility
Intimidate+SpD
110 +16Spe
70Rhydon
GROUND ROCK
Role
Bulky SupportAbility
Lightningrod+SpD
45 +9Spe
40Vullaby
DARK
Role
Bulky SupportAbility
Weakarmor+SpD
65 +11Spe
60Sandslash
GROUND
Role
Bulky SupportAbility
Sandrush+SpD
55 +10Spe
65Ferrothorn
GRASS STEEL
Role
Bulky SupportAbility
Iron Barbs+SpD
116 +16Spe
20Gliscor
GROUND
Role
Bulky SupportAbility
Poisonheal+SpD
75 +12Spe
95Forretress
BUG STEEL
Role
Bulky SupportAbility
Sturdy+SpD
60 +11Spe
40Hippowdon
GROUND
Role
Bulky SupportAbility
Sand Stream+SpD
72 +12Spe
47Registeel
STEEL
Role
Bulky SupportAbility
Clearbody+SpD
150 +20Spe
50Dusknoir
GHOST
Role
Bulky SupportAbility
Pressure+SpD
135 +18Spe
45Malamar
DARK PSYCHIC
Role
Bulky SupportAbility
Contrary+SpD
75 +12Spe
73Shuckle
BUG ROCK
Role
Bulky SupportAbility
Sturdy+SpD
230 +28Spe
5Scrafty
DARK FIGHTING
Role
Bulky SupportAbility
Shedskin+SpD
115 +16Spe
58Umbreon
DARK
Role
Bulky SupportAbility
Synchronize+SpD
130 +18Spe
65Gigalith
ROCK
Role
Bulky SupportAbility
Sand Stream+SpD
80 +13Spe
25Golurk
GROUND GHOST
Role
Physical TankAbility
Noguard+SpD
80 +13Spe
55Chansey
NORMAL
Role
Bulky SupportAbility
Healer+SpD
105 +15Spe
50Mandibuzz
DARK
Role
Bulky SupportAbility
Overcoat+SpD
95 +14Spe
80Blaziken
FIRE FIGHTING
Role
Bulky SupportAbility
Speed Boost+SpD
70 +12Spe
80Eelektross
ELECTRIC
Role
Bulky SupportAbility
Levitate+SpD
80 +13Spe
50Bastiodon
ROCK STEEL
Role
Bulky SupportAbility
Soundproof+SpD
138 +19Spe
30Swampert
WATER GROUND
Role
Bulky SupportAbility
Torrent+SpD
90 +14Spe
60Primeape
FIGHTING
Role
Bulky SupportAbility
Defiant+SpD
70 +12Spe
95Torterra
GRASS GROUND
Role
Bulky SupportAbility
Shellarmor+SpD
85 +13Spe
56Gastrodon
WATER GROUND
Role
Bulky SupportAbility
Stickyhold+SpD
82 +13Spe
39Tentacruel
WATER POISON
Role
Bulky SupportAbility
Clearbody+SpD
120 +17Spe
100Dusclops
GHOST
Role
Bulky SupportAbility
Pressure+SpD
130 +18Spe
25Avalugg
ICE
Role
Bulky SupportAbility
Sturdy+SpD
46 +9Spe
28Cloyster
WATER ICE
Role
Bulky SupportAbility
Skilllink+SpD
45 +9Spe
70Ursaring
NORMAL
Role
Bulky SupportAbility
Guts+SpD
75 +12Spe
55Hitmonchan
FIGHTING
Role
Bulky SupportAbility
Ironfist+SpD
110 +16Spe
76Altaria
DRAGON
Role
Bulky SupportAbility
Natural Cure+SpD
105 +15Spe
80Skuntank
POISON DARK
Role
Bulky SupportAbility
Aftermath+SpD
61 +11Spe
84Hariyama
FIGHTING
Role
Physical TankAbility
Thickfat+SpD
60 +11Spe
50Braviary
NORMAL
Role
Bulky SupportAbility
Defiant+SpD
75 +12Spe
80Muk
POISON
Role
Bulky SupportAbility
Poisontouch+SpD
100 +15Spe
50Regigigas
NORMAL
Role
Bulky SupportAbility
Slowstart+SpD
110 +16Spe
100Murkrow
DARK
Role
Bulky SupportAbility
Prankster+SpD
42 +9Spe
91Meowstic
PSYCHIC
Role
Bulky SupportAbility
Prankster+SpD
81 +13Spe
104Probopass
ROCK STEEL
Role
Bulky SupportAbility
Sturdy+SpD
150 +20Spe
40Sableye
DARK GHOST
Role
Bulky SupportAbility
Prankster+SpD
65 +11Spe
50Chespin
GRASS
Role
Bulky SupportAbility
Bulletproof+SpD
45 +9Spe
38Seismitoad
WATER GROUND
Role
Bulky SupportAbility
Waterabsorb+SpD
75 +12Spe
74Illumise
BUG
Role
Bulky SupportAbility
Prankster+SpD
85 +13Spe
85Piloswine
ICE GROUND
Role
Bulky SupportAbility
Thickfat+SpD
60 +11Spe
50Volbeat
BUG
Role
Bulky SupportAbility
Prankster+SpD
85 +13Spe
85Blastoise
WATER
Role
Bulky SupportAbility
Torrent+SpD
105 +15Spe
78Claydol
GROUND PSYCHIC
Role
Bulky SupportAbility
Levitate+SpD
120 +17Spe
75Audino
NORMAL
Role
Bulky SupportAbility
Regenerator+SpD
86 +13Spe
50Cradily
ROCK GRASS
Role
Bulky SupportAbility
Suctioncups+SpD
107 +15Spe
43Bergmite
ICE
Role
Bulky SupportAbility
Sturdy+SpD
35 +8Spe
28Garbodor
POISON
Role
Bulky SupportAbility
Aftermath+SpD
82 +13Spe
75Lickilicky
NORMAL
Role
Bulky SupportAbility
Owntempo+SpD
95 +14Spe
50Drapion
POISON DARK
Role
Bulky SupportAbility
Battlearmor+SpD
75 +12Spe
95Pachirisu
ELECTRIC
Role
Bulky SupportAbility
Voltabsorb+SpD
90 +14Spe
95Dunsparce
NORMAL
Role
Bulky SupportAbility
Serenegrace+SpD
65 +11Spe
45Banette
GHOST
Role
Bulky SupportAbility
Cursedbody+SpD
63 +11Spe
65Druddigon
DRAGON
Role
Bulky SupportAbility
Rough Skin+SpD
90 +14Spe
48Tangrowth
GRASS
Role
Bulky SupportAbility
Chlorophyll+SpD
50 +10Spe
50Steelix
STEEL GROUND
Role
Bulky SupportAbility
Sturdy+SpD
65 +11Spe
30Gogoat
GRASS
Role
Bulky SupportAbility
Sapsipper+SpD
81 +13Spe
68Granbull
FAIRY
Role
Bulky SupportAbility
Intimidate+SpD
60 +11Spe
45Flareon
FIRE
Role
Bulky SupportAbility
Flashfire+SpD
110 +16Spe
65Vespiquen
BUG
Role
Bulky SupportAbility
Pressure+SpD
102 +15Spe
40Trevenant
GHOST GRASS
Role
Bulky SupportAbility
Harvest+SpD
82 +13Spe
56Leavanny
BUG GRASS
Role
Physical AttackerAbility
Chlorophyll+SpD
80 +13Spe
92Poliwrath
WATER FIGHTING
Role
Bulky SupportAbility
Waterabsorb+SpD
90 +14Spe
70Magikarp
WATER
Role
Bulky SupportAbility
Swiftswim+SpD
20 +7Spe
80Tropius
GRASS
Role
Bulky SupportAbility
Harvest+SpD
87 +13Spe
51Carracosta
WATER ROCK
Role
Bulky SupportAbility
Solidrock+SpD
65 +11Spe
32Wartortle
WATER
Role
Bulky SupportAbility
Raindish+SpD
80 +13Spe
58Parasect
BUG GRASS
Role
Bulky SupportAbility
Dryskin+SpD
80 +13Spe
30Stoutland
NORMAL
Role
UtilityAbility
Intimidate+SpD
90 +14Spe
80Escavalier
BUG STEEL
Role
Bulky SupportAbility
Shellarmor+SpD
105 +15Spe
20Eelektrik
ELECTRIC
Role
Bulky SupportAbility
Levitate+SpD
70 +12Spe
40Meganium
GRASS
Role
Bulky SupportAbility
Overgrow+SpD
100 +15Spe
80Fletchinder
FIRE
Role
Bulky SupportAbility
Flame Body+SpD
52 +10Spe
84Azurill
NORMAL FAIRY
Role
Bulky SupportAbility
Huge Power+SpD
40 +9Spe
20Hypno
PSYCHIC
Role
Bulky SupportAbility
Insomnia+SpD
115 +16Spe
67Crustle
BUG ROCK
Role
Physical TankAbility
Sturdy+SpD
75 +12Spe
45Onix
ROCK GROUND
Role
Bulky SupportAbility
Weakarmor+SpD
45 +9Spe
70Swablu
NORMAL
Role
Bulky SupportAbility
Natural Cure+SpD
75 +12Spe
50Eevee
NORMAL
Role
Bulky SupportAbility
Adaptability+SpD
65 +11Spe
55Gothorita
PSYCHIC
Role
Bulky SupportAbility
Shadowtag+SpD
85 +13Spe
55Skiploom
GRASS
Role
Bulky SupportAbility
Infiltrator+SpD
65 +11Spe
80Starly
NORMAL
Role
Bulky SupportAbility
Keeneye+SpD
30 +8Spe
60+10%Sp. Defense
-10%Sp. Attack
Flavor Preference
Likes Bitter, dislikes Dry
Competitive Role
Special walls that rely on physical or status moves.
Careful vs Calm
Choose Careful
+Sp. Defense / -Sp. Attack
- Pokemon that need to check physical threats (use +Def)
- Pokemon that need to check special threats (use +SpD)
- Walls and tanks that rarely attack
Choose Calm
+Sp. Defense / -Attack
- Defensive Pokemon that still need attacking power
- Pokemon that run both physical and special moves
How to Get
SynchronizeLead with a Careful Pokemon that has the Synchronize ability. Wild Pokemon will match its nature. (Gen 3+)
BreedingGive the parent with Careful nature an Everstone. The offspring will inherit it. (100% since Gen 5)
Nature MintUse a Careful Mint to change stat effects to Careful. The original nature name stays but stats change. (Gen 8+)
Other +Sp. Defense Natures
What does the Careful nature do in Pokemon?
Careful gives your Pokemon 10% more Sp. Defense at the cost of Sp. Attack. That tradeoff works best when the lowered stat isn't part of your moveset. Pokemon with Careful nature prefer Bitter flavor and dislike Dry.
What are the best Careful nature Pokemon?
Competitively, Ho-Oh, Giratina, Skarmory, and Uxie run Careful most often. The +Sp. Defense boost complements their role, and the -Sp. Attack penalty barely affects their game plan.
Is Careful a good nature for competitive Pokemon?
For the right Pokemon, Careful is one of the best natures you can pick. It fills a solid niche for defensive builds. Just don't slap it on something that uses Sp. Attack-based moves.
How do I get a Careful nature Pokemon?
Breeding with an Everstone is the most reliable approach since Gen 5. The parent holding it passes its nature to every offspring. Synchronize works for wild catches. And if you already have the Pokemon, a Careful Mint from the Battle Tower changes the stat effects to Careful.
Should I use Careful or Calm?
Short answer: Careful for physical wall utility, Calm for special wall utility. There's no universal best. Check your Pokemon's base stats and common threats in the format you're playing to decide which tradeoff is better.