Impish gives 10% Defense at the cost of Sp. Attack. Physical walls that rely on Body Slam, Knock Off, or U-turn over special coverage will want this. In Scarlet & Violet, Ho-Oh, Ting-Lu, Giratina, and others all run Impish in competitive play. Defensive Tera types pair well with Impish. Dropping a weakness and gaining Defense makes walls much harder to break.
Impish raises Defense by 10% and lowers Sp. Attack by 10%. Physical walls that rely on physical or status moves. 100 Pokemon competitively run this nature.
SHOWINGRegional53
| # | Pokemon | Tier | Role | Ability | +Def | -SpA | Spe |
|---|---|---|---|---|---|---|---|
| 1 | Ho-Oh FIRE | S | Bulky Support | Regenerator | 90+14 | 110-13 | 90 |
| 2 | Ting-Lu DARKGROUND | S | Bulky Support | Vesselofruin | 125+17 | 55-8 | 45 |
| 3 | Giratina GHOSTDRAGON | S | Bulky Support | Pressure | 120+17 | 100-12 | 90 |
| 4 | Mudbray GROUND | A | Utility | Stamina | 70+12 | 45-7 | 45 |
| 5 | Rhydon GROUNDROCK | A | Bulky Support | Reckless | 120+17 | 45-7 | 40 |
| 6 | Dondozo WATER | A | Bulky Support | Unaware | 115+16 | 65-9 | 35 |
| 7 | Skarmory STEEL | A | Bulky Support | Sturdy | 140+19 | 40-6 | 70 |
| 8 | Sandslash GROUND | A | Bulky Support | Sandrush | 110+16 | 45-7 | 65 |
| 9 | Mudsdale GROUND | A | Bulky Support | Stamina | 100+15 | 55-8 | 35 |
| 10 | Donphan GROUND | A | Bulky Support | Sturdy | 120+17 | 60-8 | 50 |
| 11 | Regirock ROCK | A | Bulky Support | Clearbody | 200+25 | 50-7 | 50 |
| 12 | Groudon GROUND | A | Bulky Support | Drought | 140+19 | 100-12 | 90 |
| 13 | Flygon GROUNDDRAGON | A | Bulky Support | Levitate | 80+13 | 80-10 | 100 |
| 14 | Alomomola WATER | A | Bulky Support | Regenerator | 80+13 | 40-6 | 65 |
| 15 | Uxie PSYCHIC | A | Bulky Support | Levitate | 130+18 | 75-10 | 95 |
| 16 | Metagross STEELPSYCHIC | A | Physical Tank | Clearbody | 130+18 | 95-12 | 70 |
| 17 | Snorlax NORMAL | A | Bulky Support | Gluttony | 65+11 | 65-9 | 30 |
| 18 | Hitmontop FIGHTING | A | Bulky Support | Intimidate | 95+14 | 35-6 | 70 |
| 19 | Goodra DRAGON | A | Bulky Support | Sapsipper | 70+12 | 110-13 | 80 |
| 20 | Rhyperior GROUNDROCK | A | Bulky Support | Solidrock | 130+18 | 55-8 | 40 |
| 21 | Diancie ROCKFAIRY | A | Bulky Support | Clearbody | 150+20 | 100-12 | 50 |
| 22 | Torkoal FIRE | A | Bulky Support | Shellarmor | 140+19 | 85-11 | 20 |
| 23 | Hippowdon GROUND | B | Bulky Support | Sand Stream | 118+17 | 68-9 | 47 |
| 24 | Corviknight STEEL | B | Bulky Support | Pressure | 105+15 | 53-8 | 67 |
| 25 | Chesnaught GRASSFIGHTING | B | Bulky Support | Bulletproof | 122+17 | 74-10 | 64 |
| 26 | Grimmsnarl DARKFAIRY | B | Bulky Support | Prankster | 65+11 | 95-12 | 60 |
| 27 | Mandibuzz DARK | B | Bulky Support | Overcoat | 105+15 | 55-8 | 80 |
| 28 | Quagsire WATERGROUND | B | Bulky Support | Unaware | 85+13 | 65-9 | 35 |
| 29 | Gliscor GROUND | B | Bulky Support | Poisonheal | 125+17 | 45-7 | 95 |
| 30 | Gligar GROUND | B | Bulky Support | Immunity | 105+15 | 35-6 | 85 |
| 31 | Garganacl ROCK | B | Bulky Support | Purifyingsalt | 130+18 | 45-7 | 35 |
| 32 | Trapinch GROUND | B | Utility | Arenatrap | 45+9 | 45-7 | 10 |
| 33 | Altaria DRAGON | B | Bulky Support | Natural Cure | 90+14 | 70-9 | 80 |
| 34 | Orthworm STEEL | B | Bulky Support | Eartheater | 145+19 | 60-8 | 65 |
| 35 | Araquanid WATERBUG | B | Bulky Support | Waterbubble | 92+14 | 50-7 | 42 |
| 36 | Forretress BUGSTEEL | B | Bulky Support | Sturdy | 140+19 | 60-8 | 40 |
| 37 | Registeel STEEL | B | Bulky Support | Clearbody | 150+20 | 75-10 | 50 |
| 38 | Brute Bonnet GRASSDARK | B | Bulky Support | Protosynthesis | 99+15 | 79-10 | 55 |
| 39 | Avalugg ICE | B | Bulky Support | Sturdy | 184+23 | 44-7 | 28 |
| 40 | Sandaconda GROUND | B | Bulky Support | Shedskin | 125+17 | 65-9 | 71 |
| 41 | Clodsire POISONGROUND | B | Bulky Support | Waterabsorb | 60+11 | 45-7 | 20 |
| 42 | Swampert WATERGROUND | B | Bulky Support | Torrent | 90+14 | 85-11 | 60 |
| 43 | Umbreon DARK | B | Bulky Support | Synchronize | 110+16 | 60-8 | 65 |
| 44 | Tentacruel WATERPOISON | B | Bulky Support | Liquidooze | 65+11 | 80-10 | 100 |
| 45 | Breloom GRASSFIGHTING | B | Bulky Support | Technician | 80+13 | 60-8 | 70 |
| 46 | Dusknoir GHOST | B | Bulky Support | Frisk | 135+18 | 65-9 | 45 |
| 47 | Weezing POISON | B | Bulky Support | Levitate | 120+17 | 85-11 | 60 |
| 48 | Klefki STEELFAIRY | B | Bulky Support | Prankster | 91+14 | 80-10 | 75 |
| 49 | Braviary NORMAL | B | Bulky Support | Defiant | 75+12 | 57-8 | 80 |
| 50 | Kommo-o DRAGONFIGHTING | B | Bulky Support | Overcoat | 125+17 | 100-12 | 85 |
| 51 | Electivire ELECTRIC | B | Utility | Motordrive | 67+11 | 95-12 | 95 |
| 52 | Eelektross ELECTRIC | B | Bulky Support | Levitate | 80+13 | 105-13 | 50 |
| 53 | Torterra GRASSGROUND | B | Bulky Support | Overgrow | 105+15 | 75-10 | 56 |
| 54 | Leafeon GRASS | B | Bulky Support | Chlorophyll | 130+18 | 60-8 | 95 |
| 55 | Empoleon WATERSTEEL | B | Bulky Support | Torrent | 88+14 | 111-14 | 60 |
| 56 | Overqwil DARKPOISON | B | Bulky Support | Intimidate | 95+14 | 65-9 | 85 |
| 57 | Drednaw WATERROCK | B | Bulky Support | Strongjaw | 90+14 | 48-7 | 74 |
| 58 | Lapras WATERICE | B | Bulky Support | Waterabsorb | 80+13 | 85-11 | 60 |
| 59 | Tinkaton FAIRYSTEEL | B | Bulky Support | Mold Breaker | 77+12 | 70-9 | 94 |
| 60 | Regigigas NORMAL | B | Bulky Support | Slowstart | 110+16 | 80-10 | 100 |
| 61 | Primeape FIGHTING | B | Bulky Support | Defiant | 60+11 | 60-8 | 95 |
| 62 | Murkrow DARK | B | Bulky Support | Prankster | 42+9 | 85-11 | 91 |
| 63 | Smeargle NORMAL | B | Bulky Support | Owntempo | 35+8 | 20-4 | 75 |
| 64 | Qwilfish WATERPOISON | B | Bulky Support | Intimidate | 85+13 | 55-8 | 85 |
| 65 | Cobalion STEELFIGHTING | B | Bulky Support | Justified | 129+18 | 90-11 | 108 |
| 66 | Bruxish WATERPSYCHIC | B | Bulky Support | Dazzling | 70+12 | 70-9 | 92 |
| 67 | Wo-Chien DARKGRASS | B | Bulky Support | Tabletsofruin | 100+15 | 95-12 | 70 |
| 68 | Toedscruel GROUNDGRASS | B | Bulky Support | Myceliummight | 65+11 | 80-10 | 100 |
| 69 | Dudunsparce NORMAL | B | Bulky Support | Rattled | 80+13 | 85-11 | 55 |
| 70 | Crabominable FIGHTINGICE | B | Bulky Support | Ironfist | 77+12 | 62-9 | 43 |
| 71 | Scream Tail FAIRYPSYCHIC | B | Bulky Support | Protosynthesis | 99+15 | 65-9 | 111 |
| 72 | Grafaiai POISONNORMAL | B | Bulky Support | Prankster | 65+11 | 80-10 | 110 |
| 73 | Sableye DARKGHOST | C | Bulky Support | Prankster | 75+12 | 65-9 | 50 |
| 74 | Ditto NORMAL | C | Bulky Support | Imposter | 48+10 | 48-7 | 48 |
| 75 | Dachsbun FAIRY | C | Bulky Support | Wellbakedbody | 115+16 | 50-7 | 95 |
| 76 | Swalot POISON | C | Bulky Support | Stickyhold | 83+13 | 73-10 | 55 |
| 77 | Nosepass ROCK | C | Bulky Support | Sturdy | 135+18 | 45-7 | 30 |
| 78 | Hippopotas GROUND | C | Bulky Support | Sand Stream | 78+13 | 38-6 | 32 |
| 79 | Klawf ROCK | C | Bulky Support | Regenerator | 115+16 | 35-6 | 75 |
| 80 | Pineco BUG | C | Bulky Support | Sturdy | 90+14 | 35-6 | 15 |
| 81 | Toxicroak POISONFIGHTING | C | Bulky Support | Dryskin | 65+11 | 86-11 | 85 |
| 82 | Trevenant GHOSTGRASS | C | Bulky Support | Harvest | 76+12 | 65-9 | 56 |
| 83 | Wooper WATERGROUND | C | Bulky Support | Unaware | 45+9 | 25-5 | 15 |
| 84 | Tinkatuff FAIRYSTEEL | C | Bulky Support | Mold Breaker | 55+10 | 45-7 | 78 |
| 85 | Pincurchin ELECTRIC | C | Bulky Support | Electric Surge | 95+14 | 91-12 | 15 |
| 86 | Dewgong WATERICE | C | Bulky Support | Thickfat | 80+13 | 70-9 | 70 |
| 87 | Dragonair DRAGON | C | Bulky Support | Shedskin | 65+11 | 70-9 | 70 |
| 88 | Falinks FIGHTING | C | Bulky Support | Defiant | 100+15 | 70-9 | 75 |
| 89 | Minior ROCK | C | Physical Attacker | Shieldsdown | 100+15 | 60-8 | 60 |
| 90 | Spidops BUG | C | Physical Tank | Stakeout | 92+14 | 52-8 | 35 |
| 91 | Arbok POISON | C | Bulky Support | Intimidate | 69+12 | 65-9 | 80 |
| 92 | Granbull FAIRY | C | Bulky Support | Intimidate | 75+12 | 60-8 | 45 |
| 93 | Toucannon NORMAL | C | Physical Tank | Skilllink | 75+12 | 75-10 | 60 |
| 94 | Poliwrath WATERFIGHTING | C | Bulky Support | Waterabsorb | 95+14 | 70-9 | 70 |
| 95 | Ariados BUGPOISON | C | Bulky Support | Insomnia | 70+12 | 60-8 | 40 |
| 96 | Riolu FIGHTING | C | Bulky Support | Prankster | 40+9 | 35-6 | 60 |
| 97 | Quilladin GRASS | C | Bulky Support | Bulletproof | 95+14 | 56-8 | 57 |
| 98 | Charjabug BUGELECTRIC | C | Bulky Support | Battery | 95+14 | 55-8 | 36 |
| 99 | Hakamo-o DRAGONFIGHTING | D | Bulky Support | Bulletproof | 90+14 | 65-9 | 65 |
| 100 | Fidough FAIRY | D | Bulky Support | Owntempo | 70+12 | 30-5 | 65 |
Ho-Oh
FIRE
Role
Bulky SupportAbility
Regenerator+Def
90 +14Spe
90Ting-Lu
DARK GROUND
Role
Bulky SupportAbility
Vesselofruin+Def
125 +17Spe
45Giratina
GHOST DRAGON
Role
Bulky SupportAbility
Pressure+Def
120 +17Spe
90Mudbray
GROUND
Role
UtilityAbility
Stamina+Def
70 +12Spe
45Rhydon
GROUND ROCK
Role
Bulky SupportAbility
Reckless+Def
120 +17Spe
40Dondozo
WATER
Role
Bulky SupportAbility
Unaware+Def
115 +16Spe
35Skarmory
STEEL
Role
Bulky SupportAbility
Sturdy+Def
140 +19Spe
70Sandslash
GROUND
Role
Bulky SupportAbility
Sandrush+Def
110 +16Spe
65Mudsdale
GROUND
Role
Bulky SupportAbility
Stamina+Def
100 +15Spe
35Donphan
GROUND
Role
Bulky SupportAbility
Sturdy+Def
120 +17Spe
50Regirock
ROCK
Role
Bulky SupportAbility
Clearbody+Def
200 +25Spe
50Groudon
GROUND
Role
Bulky SupportAbility
Drought+Def
140 +19Spe
90Flygon
GROUND DRAGON
Role
Bulky SupportAbility
Levitate+Def
80 +13Spe
100Alomomola
WATER
Role
Bulky SupportAbility
Regenerator+Def
80 +13Spe
65Uxie
PSYCHIC
Role
Bulky SupportAbility
Levitate+Def
130 +18Spe
95Metagross
STEEL PSYCHIC
Role
Physical TankAbility
Clearbody+Def
130 +18Spe
70Snorlax
NORMAL
Role
Bulky SupportAbility
Gluttony+Def
65 +11Spe
30Hitmontop
FIGHTING
Role
Bulky SupportAbility
Intimidate+Def
95 +14Spe
70Goodra
DRAGON
Role
Bulky SupportAbility
Sapsipper+Def
70 +12Spe
80Rhyperior
GROUND ROCK
Role
Bulky SupportAbility
Solidrock+Def
130 +18Spe
40Diancie
ROCK FAIRY
Role
Bulky SupportAbility
Clearbody+Def
150 +20Spe
50Torkoal
FIRE
Role
Bulky SupportAbility
Shellarmor+Def
140 +19Spe
20Hippowdon
GROUND
Role
Bulky SupportAbility
Sand Stream+Def
118 +17Spe
47Corviknight
STEEL
Role
Bulky SupportAbility
Pressure+Def
105 +15Spe
67Chesnaught
GRASS FIGHTING
Role
Bulky SupportAbility
Bulletproof+Def
122 +17Spe
64Grimmsnarl
DARK FAIRY
Role
Bulky SupportAbility
Prankster+Def
65 +11Spe
60Mandibuzz
DARK
Role
Bulky SupportAbility
Overcoat+Def
105 +15Spe
80Quagsire
WATER GROUND
Role
Bulky SupportAbility
Unaware+Def
85 +13Spe
35Gliscor
GROUND
Role
Bulky SupportAbility
Poisonheal+Def
125 +17Spe
95Gligar
GROUND
Role
Bulky SupportAbility
Immunity+Def
105 +15Spe
85Garganacl
ROCK
Role
Bulky SupportAbility
Purifyingsalt+Def
130 +18Spe
35Trapinch
GROUND
Role
UtilityAbility
Arenatrap+Def
45 +9Spe
10Altaria
DRAGON
Role
Bulky SupportAbility
Natural Cure+Def
90 +14Spe
80Orthworm
STEEL
Role
Bulky SupportAbility
Eartheater+Def
145 +19Spe
65Araquanid
WATER BUG
Role
Bulky SupportAbility
Waterbubble+Def
92 +14Spe
42Forretress
BUG STEEL
Role
Bulky SupportAbility
Sturdy+Def
140 +19Spe
40Registeel
STEEL
Role
Bulky SupportAbility
Clearbody+Def
150 +20Spe
50Brute Bonnet
GRASS DARK
Role
Bulky SupportAbility
Protosynthesis+Def
99 +15Spe
55Avalugg
ICE
Role
Bulky SupportAbility
Sturdy+Def
184 +23Spe
28Sandaconda
GROUND
Role
Bulky SupportAbility
Shedskin+Def
125 +17Spe
71Clodsire
POISON GROUND
Role
Bulky SupportAbility
Waterabsorb+Def
60 +11Spe
20Swampert
WATER GROUND
Role
Bulky SupportAbility
Torrent+Def
90 +14Spe
60Umbreon
DARK
Role
Bulky SupportAbility
Synchronize+Def
110 +16Spe
65Tentacruel
WATER POISON
Role
Bulky SupportAbility
Liquidooze+Def
65 +11Spe
100Breloom
GRASS FIGHTING
Role
Bulky SupportAbility
Technician+Def
80 +13Spe
70Dusknoir
GHOST
Role
Bulky SupportAbility
Frisk+Def
135 +18Spe
45Weezing
POISON
Role
Bulky SupportAbility
Levitate+Def
120 +17Spe
60Klefki
STEEL FAIRY
Role
Bulky SupportAbility
Prankster+Def
91 +14Spe
75Braviary
NORMAL
Role
Bulky SupportAbility
Defiant+Def
75 +12Spe
80Kommo-o
DRAGON FIGHTING
Role
Bulky SupportAbility
Overcoat+Def
125 +17Spe
85Electivire
ELECTRIC
Role
UtilityAbility
Motordrive+Def
67 +11Spe
95Eelektross
ELECTRIC
Role
Bulky SupportAbility
Levitate+Def
80 +13Spe
50Torterra
GRASS GROUND
Role
Bulky SupportAbility
Overgrow+Def
105 +15Spe
56Leafeon
GRASS
Role
Bulky SupportAbility
Chlorophyll+Def
130 +18Spe
95Empoleon
WATER STEEL
Role
Bulky SupportAbility
Torrent+Def
88 +14Spe
60Overqwil
DARK POISON
Role
Bulky SupportAbility
Intimidate+Def
95 +14Spe
85Drednaw
WATER ROCK
Role
Bulky SupportAbility
Strongjaw+Def
90 +14Spe
74Lapras
WATER ICE
Role
Bulky SupportAbility
Waterabsorb+Def
80 +13Spe
60Tinkaton
FAIRY STEEL
Role
Bulky SupportAbility
Mold Breaker+Def
77 +12Spe
94Regigigas
NORMAL
Role
Bulky SupportAbility
Slowstart+Def
110 +16Spe
100Primeape
FIGHTING
Role
Bulky SupportAbility
Defiant+Def
60 +11Spe
95Murkrow
DARK
Role
Bulky SupportAbility
Prankster+Def
42 +9Spe
91Smeargle
NORMAL
Role
Bulky SupportAbility
Owntempo+Def
35 +8Spe
75Qwilfish
WATER POISON
Role
Bulky SupportAbility
Intimidate+Def
85 +13Spe
85Cobalion
STEEL FIGHTING
Role
Bulky SupportAbility
Justified+Def
129 +18Spe
108Bruxish
WATER PSYCHIC
Role
Bulky SupportAbility
Dazzling+Def
70 +12Spe
92Wo-Chien
DARK GRASS
Role
Bulky SupportAbility
Tabletsofruin+Def
100 +15Spe
70Toedscruel
GROUND GRASS
Role
Bulky SupportAbility
Myceliummight+Def
65 +11Spe
100Dudunsparce
NORMAL
Role
Bulky SupportAbility
Rattled+Def
80 +13Spe
55Crabominable
FIGHTING ICE
Role
Bulky SupportAbility
Ironfist+Def
77 +12Spe
43Scream Tail
FAIRY PSYCHIC
Role
Bulky SupportAbility
Protosynthesis+Def
99 +15Spe
111Grafaiai
POISON NORMAL
Role
Bulky SupportAbility
Prankster+Def
65 +11Spe
110Sableye
DARK GHOST
Role
Bulky SupportAbility
Prankster+Def
75 +12Spe
50Ditto
NORMAL
Role
Bulky SupportAbility
Imposter+Def
48 +10Spe
48Dachsbun
FAIRY
Role
Bulky SupportAbility
Wellbakedbody+Def
115 +16Spe
95Swalot
POISON
Role
Bulky SupportAbility
Stickyhold+Def
83 +13Spe
55Nosepass
ROCK
Role
Bulky SupportAbility
Sturdy+Def
135 +18Spe
30Hippopotas
GROUND
Role
Bulky SupportAbility
Sand Stream+Def
78 +13Spe
32Klawf
ROCK
Role
Bulky SupportAbility
Regenerator+Def
115 +16Spe
75Pineco
BUG
Role
Bulky SupportAbility
Sturdy+Def
90 +14Spe
15Toxicroak
POISON FIGHTING
Role
Bulky SupportAbility
Dryskin+Def
65 +11Spe
85Trevenant
GHOST GRASS
Role
Bulky SupportAbility
Harvest+Def
76 +12Spe
56Wooper
WATER GROUND
Role
Bulky SupportAbility
Unaware+Def
45 +9Spe
15Tinkatuff
FAIRY STEEL
Role
Bulky SupportAbility
Mold Breaker+Def
55 +10Spe
78Pincurchin
ELECTRIC
Role
Bulky SupportAbility
Electric Surge+Def
95 +14Spe
15Dewgong
WATER ICE
Role
Bulky SupportAbility
Thickfat+Def
80 +13Spe
70Dragonair
DRAGON
Role
Bulky SupportAbility
Shedskin+Def
65 +11Spe
70Falinks
FIGHTING
Role
Bulky SupportAbility
Defiant+Def
100 +15Spe
75Minior
ROCK
Role
Physical AttackerAbility
Shieldsdown+Def
100 +15Spe
60Spidops
BUG
Role
Physical TankAbility
Stakeout+Def
92 +14Spe
35Arbok
POISON
Role
Bulky SupportAbility
Intimidate+Def
69 +12Spe
80Granbull
FAIRY
Role
Bulky SupportAbility
Intimidate+Def
75 +12Spe
45Toucannon
NORMAL
Role
Physical TankAbility
Skilllink+Def
75 +12Spe
60Poliwrath
WATER FIGHTING
Role
Bulky SupportAbility
Waterabsorb+Def
95 +14Spe
70Ariados
BUG POISON
Role
Bulky SupportAbility
Insomnia+Def
70 +12Spe
40Riolu
FIGHTING
Role
Bulky SupportAbility
Prankster+Def
40 +9Spe
60Quilladin
GRASS
Role
Bulky SupportAbility
Bulletproof+Def
95 +14Spe
57Charjabug
BUG ELECTRIC
Role
Bulky SupportAbility
Battery+Def
95 +14Spe
36Hakamo-o
DRAGON FIGHTING
Role
Bulky SupportAbility
Bulletproof+Def
90 +14Spe
65Fidough
FAIRY
Role
Bulky SupportAbility
Owntempo+Def
70 +12Spe
65+10%Defense
-10%Sp. Attack
Flavor Preference
Likes Sour, dislikes Dry
Competitive Role
Physical walls that rely on physical or status moves.
Impish vs Bold
Choose Impish
+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 Bold
+Defense / -Attack
- Defensive Pokemon that still need attacking power
- Pokemon that run both physical and special moves
How to Get
SynchronizeLead with a Impish Pokemon that has the Synchronize ability. Wild Pokemon will match its nature. (Gen 3+)
BreedingGive the parent with Impish nature an Everstone. The offspring will inherit it. (100% since Gen 5)
Nature MintUse an Impish Mint to change stat effects to Impish. The original nature name stays but stats change. (Gen 8+)
Other +Defense Natures
What does the Impish nature do in Pokemon?
It's a +10% Defense, -10% Sp. Attack nature. The 10% multiplier applies after base stats and EVs, so the actual point difference grows as stats get higher. Pokemon with Impish nature prefer Sour flavor and dislike Dry.
What are the best Impish nature Pokemon?
Ho-Oh, Ting-Lu, Giratina, and Mudbray are among the strongest Impish picks. What they share is a reliance on Defense and little need for Sp. Attack. Check the tier list for current rankings.
Is Impish a good nature for competitive Pokemon?
Yes. It fills a solid niche for defensive builds. You'll see Impish on dedicated Defense-focused builds across most tiers and formats.
How do I get an Impish nature Pokemon?
Three options: (1) Synchronize lead forces wild Pokemon to match your lead's nature. (2) Everstone breeding passes the nature 100% of the time since Gen 5. (3) an Impish Mint changes the stat effects after the fact. Mints don't change the nature name, just the stat modifiers.
Should I use Impish or Bold?
It depends on what your team needs. Impish is the physical defense utility option. Bold is the special defense utility option. Most of the time, your Pokemon's moveset and role make the decision obvious.