How Many Pokémon Can You Get Without Evolving in Pokémon Let's Go Pikachu?
The player can get up to 135 species total in Let's Go Pikachu without trading, as described here. Without evolving any Pokémon, and only collecting evolutionary stages that the player can get in the wild, as a gift or purchase, or from an in-game trade, the player can get up to 117 species. Of the 135 possible species in Let's Go Pikachu, the Pokémon unavailable without evolving are as follows:
- Regular Evolutions (11) - 11 total
- Ivysaur, Venusaur, Charmeleon, Wartortle, Blastoise, Beedrill, Sandslash, Paras, Primeape, Hypno, and Marowak are inaccessible.
- Stone Evolutions (5) - 16 total
- Raichu, Wigglytuff, Vaporeon, Jolteon, and Flareon are inaccessible.
- Fossils (2) - 18 total
- The Fossils can only be revived into their base forms, leaving their evolutions inaccessible.
Additionally, the player cannot obtain the following Alolan forms without evolution: Raticate, Sandslash, Dugtrio, Graveler, and Muk. Since Marowak and and Raichu require evolution to obtain, Alolan Marowak and Raichu cannot be obtained either.
Professor Oak(-ish) Challenge Notes
This just contains a list of areas you can find each Pokémon, ordered as though you are playing a Professor Oak challenge and therefore need to obtain every Pokémon as early as possible.
Pre-Badge 1 (Brock) - 13 Total Pokémon
Badge 1 through Badge 2 (Misty) - 27 Total Pokémon
Although not required for Pokédex completion, Alolan Rattata can be obtained via in-game trade in Cerulean City.
- Walking on Route 3: Sandshrew (14 total)
- Walking on Route 3: Mankey (15 total)
- Walking on Route 3 (Rare Spawn): Charmander (16 total)
- Purchase on Route 4: Magikarp (17 total)
- Walking in Mt. Moon (all floors): Zubat (18 total)
- Walking in Mt. Moon (all floors): Paras (19 total)
- Walking in Mt. Moon (all floors): Geodude (20 total)
- Walking in Mt. Moon (all floors): Clefairy (21 total)
- Walking in Mt. Moon (B2F): Clefable (22 total)
- Walking in Mt. Moon (all floors): Onix (23 total)
- Walking in Mt. Moon (all floors, Rare Spawn): Chansey (24 total)
- Walking on Route 4: Psyduck (25 total)
- Walking on Route 24: Venonat (26 total)
- Walking on Route 24 (Rare Spawn): Squirtle (27 total)
Badge 2 through Badge 3 (any except Blaine or Giovanni) - 101 Total Pokémon
Although not required for Pokédex completion, some Alolan forms can be obtained via in-game trade: Geodude in Vermilion City, Diglett in Lavender Town, Sandshrew in Celadon City, and Grimer in Cinnabar Island.
- Walking on Route 5: Pidgeotto (28 total)
- Walking on Route 5: Growlithe (29 total)
- Walking on Route 5: Abra (30 total)
- Walking on Route 5: Jigglypuff (31 total)
- Gift in Vermilion City: Persian (32 total)
- Walking in Diglett's Cave: Diglett, Dugtrio (34 total)
- Walking on Route 11: Raticate (35 total)
- Walking on Route 11: Mr. Mime (36 total)
- Walking on Route 11: Drowzee (37 total)
- Walking on Route 10: Nidorina (38 total)
- Walking on Route 10: Nidorino (39 total)
- Walking on Route 10: Fearow (40 total)
- Walking on Route 10: Krabby (41 total)
- Walking in Rock Tunnel (all floors): Golbat (42 total)
- Walking in Rock Tunnel (all floors): Graveler (43 total)
- Walking in Rock Tunnel (all floors): Rhyhorn (44 total)
- Walking in Rock Tunnel (all floors): Cubone (45 total)
- Walking in Rock Tunnel (all floors): Machop (46 total)
- Walking in Rock Tunnel (all floors): Kangaskhan (47 total)
- Walking on Route 8: Arcanine (48 total)
- Walking on Route 8: Kadabra (49 total)
- Walking on Route 7 (Rare Spawn): Porygon (alternatively, get one as a gift for defeating Giovanni in Saffron City) (50 total)
- Walking in Pokémon Tower (3F and above): Gastly, Haunter (52 total)
- Static encounter on Route 12 or 16: Snorlax (53 total)
- Walking on Route 12: Gloom (54 total)
- Walking on Route 12: Kingler (55 total)
- Walking on Route 12: Farfetch'd (56 total)
- Walking on Route 14: Venomoth (57 total)
- Walking on Route 14: Scyther (58 total)
- Walking on Route 14: Tauros (59 total)
- Walking on Route 16: Doduo, Dodrio (61 total)
- Walking on Route 17: Ponyta, Rapidash (63 total)
- Walking on Route 17: Eevee (64 total)
- Gift in Silph Co. (7F): Lapras (65 total)
- Gift in the Fighting Dojo: One of Hitmonlee or Hitmonchan (66 total)
- Sea Skimming on Route 22: Poliwag, Poliwhirl (68 total)
- Sea Skimming on Route 6: Goldeen, Seaking (70 total)
- Sea Skimming on Route 10: Tentacool, Tentacruel (72 total)
- Sea Skimming on Route 10: Dratini, Dragonair (74 total)
- Sea Skimming on Route 12: Horsea, Seadra (76 total)
- Walking in the Power Plant: Voltorb, Electrode (78 total)
- Walking in the Power Plant: Magnemite, Magneton (80 total)
- Walking in the Power Plant: Grimer, Muk (82 total)
- Walking in the Power Plant: Electabuzz (83 total)
- Static encounter in the Power Plant: Zapdos (84 total)
- Sea Skimming on Route 19: Staryu, Starmie (86 total)
- Sea Skimming on Route 20: Gyarados (87 total)
- Walking in the Seafoam Islands (all floors): Jynx (88 total)
- Walking in the Seafoam Islands (all floors): Seel, Dewgong (90 total)
- Walking in the Seafoam Islands (all floors): Slowpoke, Slowbro (92 total)
- Sea Skimming in the Seafoam Islands (B3F and B4F): Shellder, Cloyster (94 total)
- Static encounter in the Seafoam Islands (B4F): Articuno (95 total)
- Revive the Old Amber in Cinnabar Lab: Aerodactyl (96 total)
- Revive the Helix or Dome Fossil in Cinnabar Lab: One of Omanyte or Kabuto (97 total)
- Walking in Pokémon Mansion (all floors): Ditto (98 total)
- Walking in Pokémon Mansion (all floors): Magmar (99 total)
- Walking on Route 21: Vileplume (100 total)
- Walking on Route 21: Tangela (101 total)
Badge 3 through Badge 7 (any except Blaine or Giovanni) - 105 Total Pokémon
- Walking on Route 23: Nidoqueen (102 total)
- Walking on Route 23: Nidoking (103 total)
- Walking on Route 23: Exeggute, Exeggutor (105 total)
Badge 7 through Elite Four - 109 Total Pokémon
Although not required for Pokédex completion, Alolan Exeggutor can be obtained via in-game trade in Indigo Plateau.
- Walking in Victory Road (all floors): Rhydon (106 total)
- Walking in Victory Road (all floors): Machoke (107 total)
- Walking in Victory Road (2F or 3F, Rare Spawn): The other of Hitmonlee or Hitmonchan (108 total)
- Static encounter in Victory Road (2F): Moltres (109 total)
Post-Elite Four - 117 Total Pokémon
- Walking in Cerulean Cave (1F and B1F): Golduck (110 total)
- Walking in Cerulean Cave (all floors): Lickitung (111 total)
- Revive a Helix or Dome Fossil found in Cerulean Cave: The other of Omanyte or Kabuto (112 total)
- Sea Skimming in Cerulean Cave (1F and B1F): Poliwrath (113 total)
- Static encounter in Cerulean Cave (B1F): Mewtwo (114 total)
- Flying in Pallet Town, Viridian City, Pewter City, Cerulean City, Vermilion City, Lavender Town, Fuchsia City, Cinnabar Island, Routes 1, 2, 5, 6, 7, 8, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 24, or 25: Pidgeot (115 total)
- Flying in Routes 1, 2, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 23, 24, and 25 (Rare Spawn): Charizard (116 total)
- Flying in Routes 1, 2, 3, 4, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 23, 24, and 25 (Rare Spawn): Dragonite (117 total)