Would it be possible to list what Pokemon didn't appear on any pills? I get it if that's too much work...
It's a little bit of work, but not enough to deter me! Here's a read more with it, because. It's a long list ^^; I'm putting any regional variants or mega evos at the end!
Charmander Charmeleon Caterpie Metapod Weedle Kakuna Pidgey Pidgeotto Pidgeot Rattata Raticate Spearow Fearow Ekans Sandshrew Sandslash Nidoran♀ Nidorina Nidoran♂ Nidorino Zubat Oddish Gloom Vileplume Paras Venonat Venomoth Diglett Golduck Mankey Primeape Growlithe Poliwag Poliwhirl Poliwrath Abra Kadabra Machop Machoke Machamp Bellsprout Weepinbell Victreebel Tentacool Geodude Graveler Golem Slowpoke Magneton Farfetch'd Seel Grimer Shellder Cloyster Onix Drowzee Krabby Voltorb Electrode Exeggcute Exeggutor Marowak Hitmonlee Lickitung Koffing Weezing Rhyhorn Tangela Kangaskhan Horsea Seadra Goldeen Starmie Mr. Mime Scyther Magmar Pinsir Kabutops Aerodactyl Articuno Zapdos Moltres Hoothoot Noctowl Lanturn Pichu Xatu Marill Sudowoodo Hoppip Skiploom Sunflora Yanma Murkrow Unown Wobbuffet Pineco Forretress Steelix Snubbull Granbull Sneasel Ursaring Slugma Remoraid Houndour Donphan Tyrogue Hitmontop Smoochum Elekid Raikou Larvitar Pupitar Treecko Torchic Combusken Marshtomp Poochyena Mightyena Silcoon Cascoon Seedot Shiftry Taillow Swellow Wingull Pelipper Surskit Shroomish Slakoth Vigoroth Slaking Loudred Exploud Hariyama Azurill Aron Lairon Meditite Plusle Gulpin Swalot Carvanha Sharpedo Wailmer Wailord Numel Torkoal Trapinch Vibrava Cacnea Zangoose Lunatone Solrock Barboach Crawdaunt Baltoy Lileep Feebas Kecleon Shuppet Dusclops Wynaut Snorunt Sealeo Clamperl Huntail Gorebyss Luvdisc Bagon Shelgon Beldum Metang Regice Registeel Groudon Grotle Chimchar Prinplup Starly Staravia Bibarel Kricketune Luxio Budew Rampardos Shieldon Bastiodon Burmy Wormadam Mothim Combee Floatzel Ambipom Honchkrow Bronzor Bonsly Mime Jr. Happiny Hippopotas Hippowdon Finneon Lumineon Mantyke Snover Lickilicky Tangrowth Electivire Magmortar Yanmega Mamoswine Uxie Azelf Dialga Palkia Cresselia Phione Pignite Emboar Patrat Watchog Lillipup Stoutland Purrloin Simisage Simisear Panpour Simipour Musharna Tranquill Unfezant Blitzle Boldore Drilbur Audino Timburr Conkeldurr Tympole Palpitoad Throh Sewaddle Swadloon Cottonee Petilil Basculin Krokorok Darumaka Darmanitan Crustle Yamask Tirtouga Gothita Gothorita Gothitelle Solosis Duosion Ducklett Vanillite Vanillish Deerling Sawsbuck Foongus Frillish Alomomola Ferroseed Klink Klang Klinklang Tynamo Eelektrik Shelmet Accelgor Stunfisk Mienfoo Druddigon Golett Pawniard Bouffalant Rufflet Braviary Vullaby Mandibuzz Durant Deino Larvesta Cobalion Tornadus Thundurus Landorus Meloetta Quilladin Froakie Bunnelby Fletchinder Scatterbug Vivillon Litleo Pangoro Doublade Spritzee Inkay Binacle Skrelp Clawitzer Tyrunt Dedenne Bergmite Volcanion Popplio Brionne Pikipek Trumbeak Yungoos Gumshoos Grubbin Charjabug Crabrawler Oricorio Cutiefly Fomantis Morelull Bounsweet Steenee Comfey Oranguru Passimian Sandygast Palossand Bruxish Drampa Hakamo-o Tapu Koko Tapu Bulu Tapu Fini Cosmoem Solgaleo Celesteela Kartana Guzzlord Naganadel Meltan Melmetal Grookey Thwackey Rillaboom Raboot Drizzile Inteleon Skwovet Greedent Rookidee Corvisquire Blipbug Dottler Nickit Thievul Gossifleur Eldegoss Chewtle Drednaw Boltund Rolycoly Carkol Coalossal Applin Flapple Silicobra Sandaconda Cramorant Arrokuda Barraskewda Sizzlipede Grapploct Sinistea Hattrem Sirfetch'd Mr. Rime Milcery Snom Stonjourner Morpeko Cufant Copperajah Arctozolt Arctovish Duraludon Drakloak Zacian Urshifu Zarude Regidrago Glastrier Spectrier Calyrex Overqwil Crocalor Quaxwell Quaquaval Lechonk Oinkologne Nymble Pawmi Pawmo Tandemaus Fidough Smoliv Dolliv Arboliva Nacli Naclstack Armarouge Tadbulb Bellibolt Wattrel Maschiff Bramblin Toedscruel Klawf Capsakid Scovillain Rabsca Tinkatink Tinkatuff Wiglett Wugtrio Bombirdier Palafin Varoom Orthworm Glimmet Greavard Flamigo Veluza Dondozo Annihilape Kingambit Great Tusk Brute Bonnet Flutter Mane Iron Treads Iron Bundle Iron Hands Iron Moth Iron Thorns Frigibax Arctibax Baxcalibur Gimmighoul Wo-Chien Ting-Lu Iron Leaves Dipplin Okidogi Munkidori Fezandipiti Archaludon Gouging Fire Raging Bolt Iron Boulder Iron Crown Additional Forms + Regional Variants + Mega Evos
VenusaurM CharizardMY BlastoiseM BeedrillM PidgeotM DiglettA DugtrioA MeowthA PersianA AlakazamM GeodudeA GravelerA GolemA SlowbroM Farfetch'dG GrimerA VoltorbH ElectrodeH ExeggutorA MarowakA WeezingG KangaskhanM Mr. MimeG PinsirM GyaradosM AerodactylM ArticunoG ZapdosG MoltresG MewtwoMX SlowkingG SteelixM QwilfishH ScizorM HeracrossM SneaselH CorsolaG HoundoomM TyranitarM SceptileM BlazikenM SwampertM LinooneG GardevoirM SableyeM AggronM MedichamM SharpedoM CameruptM BanetteM GlalieM SalamenceM LatiasM LatiosM KyogreP RayquazaM LopunnyM GarchompM AbomasnowM AudinoM DarumakaG DarmanitanZ DarmanitanG DarmanitanGZ YamaskG StunfiskG BraviaryH SliggooH AvaluggH DiancieM CalyrexI