Catch rate

Catch rate formula

When you throw a Poké Ball at a wild Pokémon, the game uses a formula based on the wild Pokémon's current health, any status effect it may have, and that Pokémon's Catch Rate, to determine your chances of catching that Pokémon. The formula is as follows:

Chance = floor (((( TotalHP * 4 ) - ( CurrentHP * 2 )) * CatchRate ) / TotalHP ) + Status + 1

Note: floor means to make the number an integer by rounding downwards, i.e. even floor(1.999) would be equal to 1.

CurrentHP is either the wild Pokémon's current HP, or if its current HP is greater than 255, use floor ( CurrentHP / 4).

TotalHP works exactly like CurrentHP, except using the Pokémon's maximum HP value.

CatchRate uses the wild Pokémon's Catch Rate, found below.

Status - If the wild Pokémon is asleep or frozen, Status = 10. If it is paralyzed, poisoned, or burnt, Status = 5. Otherwise, Status = 0.

The chance is further modified according to the kind of Poké Ball you use; for a full list see Poké Ball. After all these values have been calculated, the game computes a random number anywhere from 0 to 255 inclusive. If this random number is less than the Chance calculated above, the Pokémon is caught.

Pokémon catch rates

Every Pokémon has a certain number used for its CatchRate in the above formula. The bigger the number, the easier it is to catch. Here, you can find each Pokémon's catch rate:

ADVPOKEMON
Bulbasaur	045
Ivysaur	045
Venusaur	045
Charmander	045
Charmeleon	045
Charizard	045
Squirtle	045
Wartortle	045
Blastoise	045
Caterpie	255
Metapod	120
Butterfree	045
Weedle	255
Kakuna	120
Beedrill	045
Pidgey	255
Pidgeotto	120
Pidgeot	045
Rattata	255
Raticate	090
Spearow	255
Fearow	090
Ekans	255
Arbok	090
Pikachu	190
Raichu	075
Sandshrew	255
Sandslash	090
Nidoran♀	235
Nidorina	120
Nidoqueen	045
Nidoran♂	235
Nidorino	120
Nidoking	045
Clefairy	150
Clefable	025
Vulpix	190
Ninetales	075
Jigglypuff	170
Wigglytuff	050
Zubat	255
Golbat	090
Oddish	255
Gloom	120
Vileplume	045
Paras	190
Parasect	075
Venonat	190
Venomoth	075
Diglett	255
Dugtrio	050
Meowth	255
Persian	090
Psyduck	190
Golduck	075
Mankey	190
Primeape	075
Growlithe	190
Arcanine	075
Poliwag	255
Poliwhirl	120
Poliwrath	045
Abra	200
Kadabra	100
Alakazam	050
Machop	180
Machoke	090
Machamp	045
Bellsprout	255
Weepinbell	120
Victreebel	045
Tentacool	190
Tentacruel	060
Geodude	255
Graveler	120
Golem	045
Ponyta	190
Rapidash	060
Slowpoke	190
Slowbro	075
Magnemite	190
Magneton	060
Farfetch'd	045
Doduo	190
Dodrio	045
Seel	190
Dewgong	075
Grimer	190
Muk	075
Shellder	190
Cloyster	060
Gastly	190
Haunter	090
Gengar	045
Onix	045
Drowzee	190
Hypno	075
Krabby	215
Kingler	060
Voltorb	190
Electrode	060
Exeggcute	090
Exeggutor	045
Cubone	190
Marowak	075
Hitmonlee	045
Hitmonchan	045
Lickitung	045
Koffing	190
Weezing	060
Rhyhorn	120
Rhydon	060
Chansey	030
Tangela	045
Kangaskhan	045
Horsea	215
Seadra	075
Goldeen	215
Seaking	060
Staryu	215
Starmie	060
Mr. Mime	045
Scyther	045
Jynx	045
Electabuzz	045
Magmar	045
Pinsir	045
Tauros	045
Magikarp	255
Gyarados	045
Lapras	045
Ditto	035
Eevee	045
Vaporeon	045
Jolteon	045
Flareon	045
Porygon	045
Omanyte	045
Omastar	045
Kabuto	045
Kabutops	045
Aerodactyl	045
Snorlax	025
Articuno	003
Zapdos	003
Moltres	003
Dratini	045
Dragonair	045
Dragonite	045
Mewtwo	003
Mew	045
Chikorita	045
Bayleef	045
Meganium	045
Cyndaquil	045
Quilava	045
Typhlosion	045
Totodile	045
Croconaw	045
Feraligatr	045
Sentret	255
Furret	090
Hoothoot	255
Noctowl	090
Ledyba	255
Ledian	090
Spinarak	255
Ariados	090
Crobat	090
Chinchou	190
Lanturn	075
Pichu	190
Cleffa	150
Igglybuff	170
Togepi	190
Togetic	075
Natu	190
Xatu	075
Mareep	235
Flaaffy	120
Ampharos	045
Bellossom	045
Marill	190
Azumarill	075
Sudowoodo	065
Politoed	045
Hoppip	255
Skiploom	120
Jumpluff	045
Aipom	045
Sunkern	235
Sunflora	120
Yanma	075
Wooper	255
Quagsire	010
Espeon	045
Umbreon	045
Murkrow	030
Slowking	070
Misdreavus	045
Unown	215
Wobbuffet	045
Girafarig	060
Pineco	190
Forretress	075
Dunsparce	190
Gligar	060
Steelix	025
Snubbull	190
Granbull	075
Qwilfish	045
Scizor	025
Shuckle	190
Heracross	045
Sneasel	060
Teddiursa	120
Ursaring	060
Slugma	190
Magcargo	075
Swinub	215
Piloswine	075
Corsola	060
Remoraid	190
Octillery	075
Delibird	045
Mantine	025
Skarmory	025
Houndour	120
Houndoom	045
Kingdra	045
Phanpy	120
Donphan	060
Porygon2	045
Stantler	045
Smeargle	045
Tyrogue	075
Hitmontop	045
Smoochum	045
Elekid	045
Magby	045
Miltank	045
Blissey	030
Raikou	003
Entei	003
Suicune	003
Larvitar	045
Pupitar	045
Tyranitar	045
Lugia	003
Ho-oh	003
Celebi	045
Treecko	045
Grovyle	045
Sceptile	045
Torchic	045
Combusken	045
Blaziken	045
Mudkip	045
Marshtomp	045
Swampert	045
Poochyena	255
Mightyena	127
Zigzagoon	255
Linoone	090
Wurmple	255
Silcoon	120
Beautifly	045
Cascoon	120
Dustox	045
Lotad	255
Lombre	120
Ludicolo	045
Seedot	255
Nuzleaf	120
Shiftry	045
Taillow	200
Swellow	045
Wingull	190
Pelipper	045
Ralts	235
Kirlia	120
Gardevoir	045
Surskit	200
Masquerain	075
Shroomish	255
Breloom	090
Slakoth	255
Vigoroth	120
Slaking	045
Nincada	255
Ninjask	120
Shedinja	045
Whismur	190
Loudred	120
Exploud	045
Makuhita	180
Hariyama	200
Azurill	150
Nosepass	255
Skitty	255
Delcatty	060
Sableye	045
Mawile	045
Aron	180
Lairon	090
Aggron	045
Meditite	180
Medicham	090
Electrike	120
Manectric	045
Plusle	200
Minun	200
Volbeat	150
Illumise	150
Roselia	150
Gulpin	225
Swalot	075
Carvanha	225
Sharpedo	060
Wailmer	125
Wailord	060
Numel	255
Camerupt	150
Torkoal	090
Spoink	255
Grumpig	060
Spinda	255
Trapinch	255
Vibrava	120
Flygon	045
Cacnea	190
Cacturne	060
Swablu	255
Altaria	045
Zangoose	090
Seviper	090
Lunatone	045
Solrock	045
Barboach	190
Whiscash	075
Corphish	205
Crawdaunt	155
Baltoy	255
Claydol	090
Lileep	045
Cradily	045
Anorith	045
Armaldo	045
Feebas	255
Milotic	060
Castform	045
Kecleon	200
Shuppet	225
Banette	045
Duskull	190
Dusclops	090
Tropius	200
Chimecho	045
Absol	030
Wynaut	125
Snorunt	190
Glalie	075
Spheal	255
Sealeo	120
Walrein	045
Clamperl	255
Huntail	060
Gorebyss	060
Relicanth	025
Luvdisc	225
Bagon	045
Shelgon	045
Salamence	045
Beldum	003
Metang	003
Metagross	003
Regirock	003
Regice	003
Registeel	003
Latias	003
Latios	003
Kyogre	005
Groudon	005
Rayquaza	003
Jirachi	003
Deoxys	003

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Source(s): [1], [2]