This is the Pokedex as I know it.
001 Bulbasaur Grass/Poison Choose it at the beginning of the game 002
Ivysaur Grass/Poison The evolved form of 001 Bulbasaur 003 Venusaur
Grass/Poison The evolved form of 002 Ivysaur 004 Charmander Fire Get
it from Prof. Oak at the beginning of the game. 005 Charmeleon Fire
The evolved form of 004 Charmander 006 Charizard Fire The evolved form
of 005 Charmeleon 007 Squirtle Water Get it from Prof. Oak at the
beginning of the game. 008 Wartortle Water The evolved form of 007
Squirtle 009 Blastoise Water The evolved form of 008 Wartortle 010
Caterpie Bug Viridian Forest 011 Metapod Bug Viridian Forest 012
Butterfree Flying/Bug Evolved from 011 Metapod 013 Weedle Bug/Poison
Route 25 014 Kakuna Bug/Poison Route 25 015 Beedrill Bug/Poison
Evolved from 014 Kakuna 016 Pidgey Normal/Flying All over the place.
Check the beginning. 017 Pidgeotto Normal/Flying Evolved from 016
Pidgey 018 Pidgeot Normal/Flying Evolved from 017 Pidgeotto 019
Rattata Normal Very common 020 Raticate Normal Evolved from 019
Rattata 021 Spearow Normal/Flying Very common 022 Fearow Normal/Flying
Evolved from 021 Spearow 023 Ekans Poison In red pack. Route 4, 9, 8,
11 024 Arbok Poison Evolved from 023 Ekans 025 Pikachu Electric
Veridian Forest 026 Raichu Electric Use a Thunderstone on 025 Pikachu.
Or in the Power Plant. 027 Sandshrew Ground Route 4, 8, 9, 11 028
Sandslash Ground Evolved from 027 Sandshrew 029 Nidoran(Female) Poison
Safari Zone 030 Nidorina Poison Evolved from 029 Nidoran(Female) Also
in Safari Zone. 031 Nidoqueen Poison/Ground Use Moonstone on 030
Nidorina 032 Nidoran (Male) Poison Safari Zone or Route 22 (left of
Cerulean City) 033 Nidorino Poison Evolved form of 032
Nidoran(Male)/Safari Zone 034 Nidoking Poison/Ground Use Moonstone on
033 Nidorino 035 Clefairy Normal Mt. Moon or Exchange Corner in
Celadon City 036 Clefable Normal Use Moonstone on 035 Clefairy 037
Vulpix Fire Pokemon Mansion in Cinnabar Island or Route 7 or 8 038
Ninetales Fire Use Firestone on 037 Vulpix 039 Jigglypuff Normal Route
3 040 Wigglytuff Normal Use Moonstone on 039 Jigglypuff 041 Zubat
Poison/Flying Caves such as Mt. Moon 042 Golbat Poison/Flying Victory
Road (in the cave area) 043 Oddish Grass/Poison Red Pak only. Routes
5,6,7,25 044 Gloom Grass/Poison Evolved form of 043 Oddish 045
Vileplume Grass/Poison Use Leafstone on 044 Gloom 046 Paras Bug/Grass
Safari Zone/Mt. Moon 047 Parasect Bug/Grass Evolved form of 046 Paras.
Safari Zone 048 Venonat Bug/Poison Safari Zone/Routes 12,13,14,15 049
Venomoth Bug/Poison Safari Zone/Victory Road Cave 050 Diglett Ground
Diglett's Cave(duh...) It's close to Vermillion City 051 Dugtrio
Ground Evolved form of 050 Diglett/Diglett's Cave (Very rare!) 052
Meowth Normal Blue Pak only. Routes 5,6,7,8 053 Persian Normal Blue
Pak only. Evolved form of 052 Meowth 054 Psyduck Water Cinnabar
Islands/Route 24,25 055 Golduck Water Evolved form of 054 Psy
duck/Cinnabar Islands 056 Mankey Fighting Red Version only. Routes
5,6,7,8 057 Primeape Fighting Evolved form of 056 Mankey 058 Growlithe
Fire Red Version only. Pokemon Mansion 059 Arcanine Fire Use Firestone
on 058 Growlithe 060 Poliwag Water Cerulean City, Vermillion City,
Route 22 061 Poliwhirl Water Evolved form of 060 Poliwag. Try fishing
on Route 9 062 Poliwrath Water/Fighting Use Waterstone on 061
Poliwhirl 063 Abra Psychic Routes 24,25 064 Kadabra Psychic Evolved
form of 063 Abra 065 Alakazam Psychic Trade 064 Kadabra 066 Machop
Fighting Victory Route and Rock Tunnel 067 Machoke Fighting Evolved
form of 066 Machop. Victory Road 068 Machamp Fighting Trade 067
Machoke 069 Bellsprout Grass/Poison Blue Pak only. Routes 5,6,7,8. 070
Weepinbell Grass/Poison Evolved form of 069 Bellsprout 071 Victreebel
Grass/Poison Use Leafstone on 070 Weepinbell 072 Tentacool
Water/Poison The Sea Route/fish on Route 12 073 Tentacruel
Water/Poison Evolved form of 072 Tentacool 074 Geodude Rock/Ground Mt.
Moon 075 Graveler Rock/Ground Evolved form of 074 Geodude 076 Golem
Rock/Ground Trade 075 Graveler 077 Ponyta Fire Pokemon Mansion on
Cinnabar Islands 078 Rapidash Fire Evolved form of 077 Ponyta 079
Slowpoke Water/Psychic Sea Route 080 Slowbro Water/Psychic Evolved
form of 079 Slowpoke 081 Magnemite Electric Power Plant 082 Magneton
Electric Evolved form of 081 Magnemite 083 Farfetch'd Normal/Flying
Trade a Spearow to the person in the house left of the shop in
Vermillion City. 084 Doduo Normal/Flying Route 17 and Safari Zone 085
Dodrio Normal/Flying Evolved form of 084 Doduo 086 Seel Water Sea
Route 087 Dewgong Water/Ice Evolved form of 086 Seel 088 Grimer Poison
Pokemon Mansion 089 Muk Poison Evolved form of 088 Grimer. Also in the
Pokemon Mansion 090 Shellder Water sea Route 091 Cloyster Water/Ice
Use Waterstone on 090 Shellder 092 Gastly Ghost/Poison Pokemon Tower
in Lavender Town 093 Haunter Ghost/Poison Pokemon Tower in Lavender
Town 094 Gengar Ghost/Poison Trade 093 Haunter 095 Onix Rock/Ground
Mt. Moon and Victory Road 096 Drowzee Psychic Route 11 097 Hypno
Psychic Drowzee at lvl 26 098 Krabby Water Fish just about anywhere
(too many locations to list 099 Kingler Water Seafoam Islands or
Krabby at lvl 28 100 Voltorb Electric Power Plant, Route 9 101
Electrode Electric Power Plant or Voltorb at lvl 30 102 Exeggcute
Grass/Psychic Safari Zone 103 Exeggutor Grass/Psychic Use Leafstone on
102 Exeggcute 104 Cubone Ground Pokemon Tower in Lavender Town 105
Marowak Ground Marowak at lvl 28 106 Hitmonlee Fighting Choose between
Hitmonlee and Hitmonchan in the small gym in Saffron City 107
Hitmonchan Fighting Choose between Hitmonlee and Hitmonchan in the
small gym in Saffron City 108 Lickitung Normal Route 18 109 Koffing
Poison Pokemon Mansion on Cinnabar 110 Weezing Poison Pokemon Mansion
on Cinnabar 111 Rhyhorn Ground/Rock Safari Zone 112 Rhydon Ground/Rock
Rhydon at lvl 42 113 Chansey Normal Safari Zone and the Mewtwo cave.
114 Tangela Grass On the way up from Cinnabar to Pallet, there's a
patch of grass on the water. Look there. 115 Kangaskhan Normal Safari
Zone 116 Horsea Water Sea Route 117 Seadra Water Horsea at lvl 32 118
Goldeen Water You won't have any trouble. Just fish everywhere. 119
Seaking Water Goldeen at lvl 33 120 Staryu Water Sea Route 121 Starmie
Water/Psychic Use Waterstone on 120 Staryu 122 Mr. Mime Psychic You go
past the Diglet cave, then go to a house due south. Trade with the
person in the house. 123 Scyther Bug/Flying Safari Zone (Red Version
only) 124 Jynx Ice/Psychic In one of the houses in Cerulean City
there's a person who wants to trade a Poliwhirl 125 Electabuzz
Electric Power Plant (Red Version only 126 Magmar Fire Pokemon Mansion
(Blue Version only) 127 Pinsir Bug Safari Zone (Blue Version only) 128
Tauros Normal Safari Zone 129 Magikarp Water Fish on Routes
12,13,17,18 130 Gyarados Water/Flying Get Magikarp to lvl 20 131
Lapras Water/Ice In Saffron City in Silph Co. after beating your rival
talk to the guy that's in the same room and he'll give you a Lapras
132 Ditto Normal Routes 13,14,15 133 Eevee Normal The Mansion in
Celadon City. Do through the back door 134 Vaporeon Water Use
Waterstone on 133 Eevee 135 Jolteon Electric Use Thunderstone on 133
Eevee 136 Flareon Fire Use Firestone on 133 Eevee 137 Porygon Normal
Buy Porygon at the Celadon City Exchange Corner 138 Omanyte Rock/Water
Bring a Helix Fossil to the lab on Cinnabar and the scientist will
resurrect Omanyte 139 Omastar Rock/Water Omanyte at lvl 40 140 Kabuto
Rock/Water Bring a Dome Fossil to the lab on Cinnabar and the
scientist will resurrect Kabuto 141 Kabutops Rock/Water Kabuto at lvl
40 142 Aerodactyl Rock/Flying Bring the Amber to the lab on Cinnabar
and the scientist will resurrect Aerodactyl. Get the Amber at the
Pewter City Museum. 143 Snorlax Normal You'll find this no matter
what. Just make sure to catch it 144 Articuno Ice/Flying Seafoam
Island. It's hard to find so try doing stuff with the white rocks and
dropping into the holes. 145 Zapdos Electric/Flying At the end of the
Power Plant 146 Moltres Fire/Flying Victory Road 147 Dratini Dragon
Fish in the Safari Zone. Hard to find! Use a Super Rod 148 Dragonair
Dragon Dratini at lvl 30 149 Dragonite Dragon/Flying Dragonair at lvl
55 150 Mewtwo Psychic Unknown Dungeon 151 Mew