User:Igor Rowan/List of Pokémon by critical hit rate

In Generation I only, the chance of a Pokémon landing a critical hit was directly tied to its species' base speed and it was calculated differently between the mainline games and Pokémon Stadium.

Speed Pokémon Hit Rate
In RBY In Stad.
15 Slowpoke 2.92% 8.88%
20 JigglypuffGeodude 3.9% 9.37%
25 ParasGrimerRhyhorn 4.88% 9.86%
30 MetapodOddishParasectSlowbroLickitungSnorlax 5.85% 10.35%
35 KakunaClefairyMachopGravelerKoffingOmanyte 6.83% 10.83%
40 SandshrewGloomBellsproutShellderExeggcuteRhydonPorygon 7.81% 11.32%
41 Nidoran♀ 8% 11.42%
42 Drowzee 8.2% 11.52%
43 Squirtle 8.39% 11.62%
45 BulbasaurCaterpieWigglytuffVenonatMachokeGolemMagnemiteSeelMarowak 8.78% 11.81%
48 Ditto 9.37% 12.1%
50 BulbasaurNidoran♂VileplumeMukKrabbyChanseyDratini 9.76% 12.3%
55 EkansZubatPsyduckMachampWeepinbellExeggutorEeveeOmastarKabuto 10.74% 12.79%
56 PidgeyNidorina 10.93% 12.89%
58 Wartortle 11.32% 13.08%
60 IvysaurClefableGrowlitheFarfetch'dWeezingTangelaHorseaLapras 11.71% 13.28%
63 Goldeen 12.3% 13.57%
65 CharmanderSandslashNidorinoVulpixVaporeonFlareon 12.69% 13.76%
67 Hypno 13.08% 13.96%
68 Seaking 13.28% 14.06%
70 ButterfreeSpearowMankeyPoliwrathVictreebelTentacoolMagnetonDewgongCloysterOnixDragonair 13.67% 14.25%
71 Pidgeotto 13.86% 14.35%
72 Rattata 14.06% 14.45%
75 BeedrillDoduoKingler 14.64% 14.74%
76 NidoqueenHitmonchan 14.84% 14.84%
78 Blastoise 15.23% 15.03%
80 VenusaurCharmeleonArbokGastlyMagikarpKabutopsDragonite 15.62% 15.23%
81 Gyarados 15.82% 15.33%
85 NidokingGolduckSeadraStaryuPinsirArticuno 16.6% 15.72%
87 Hitmonlee 16.99% 15.91%
90 PikachuGolbatVenomothMeowthPoliwagPoliwhirlAbraPonytaKangaskhan 17.57% 16.21%
91 Pidgeot 17.77% 16.31%
93 Magmar 18.16% 16.5%
95 DiglettPrimeapeArcanineHaunterJynx 18.55% 16.7%
97 Raticate 18.94% 16.89%
100 CharizardFearowRaichuNinetalesTentacruelDodrioVoltorbZapdosMew 19.53% 17.18%
105 KadabraRapidashScytherElectabuzz 20.50% 17.67%
110 GengarTauros 21.48% 18.16%
115 PersianStarmie 22.46% 18.65%
120 DugtrioAlakazam 23.43% 19.14%
130 JolteonAerodactylMewtwo 25.39% 20.11%
140 Electrode 27.34% 21.09%

Quirks

If a Pokémon with a base speed of 64 (52 in Pokémon Stadium) or higher uses a move with a high chance to get a critical hit, it can reliably land critical hits 99.6%* of the time. The following Pokémon are elegible:

Move Type Pow. Acc. Learned by
Crabhammer Water 90 85  
Karate Chop Normal 50 100    * * *
Razor Leaf Grass 55 95  *  * 
Slash Flying 70 100       
   *   *