1. Bulbasaur
Grass/ Posion
This one is one of the starting Pokemon

2. Ivysuar
Grass/ Poison
Evolves from Bulbasaur at level 16

3. Venusaur
Grass/ Poison
Evolves from Ivysaur at level 32

4. Charmander
Fire
One of the starting Pokemon

5. Charmeleon
Fire
Evolves from Charmander at level 16

6. Charizard
Fire/ Flying
Evolves from Charmeleon at level 36

7. Squirtle
Water
One of the starting Pokemon

8. Wartortle
Water
Evolves from Squirtle at level 16

9. Blastoise
Water
Evolves from Wartortle at level 36

10. Caterpie
Bug
Find in Route 2, Viridian Forest, or Route 25

11. Metapod
Bug
Evolves from Caterpie at level 7 or find in Viridian Forest, Route 24,
or Route 25

12. Butterfree
Bug/ Flying
Evolves from Metapod at level 10

13. Weedle
Bug/ Poison
Find in Viridian Forest, Route 2, Route 24, or Route 25

14. Kakuna
Bug/ Poison
Evolves from Weedle at level 7 or find in Viridian Forest, Route 24 or
Route 25.

15. Beedrill
Bug/ Poison
Evolves from Kakuna at level 10

16. Pidgey
Normal/ Flying
Found in most places, but try Route 2, 25, 24, 5, 7, 8, and 6

17. Pidgeotto
Normal/ Flying
Evolves from Pidgey at level 18, or find in Routes 21, 15, and 14

18. Pidgeot
Normal/ Flying
Evolves from Pidgeotto at level 36

19. Rattata
Normal
Found mostly everwhere, but try Routes 1, 2, 15, 14 and 21

20. Raticate
Normal
Evolves from Rattata at level 20 or found in Routes 21, 17, 16, 18

21. Spearow
Normal/ Flying
Found in Routes 17, 18, 16, 3, 4, 9, and 22

22. Fearow
Normal/ Flying
Evolves from Spearow at level 20 or find in Route 23, 17, or 18

23. Ekans
Poison
Cannot be found in Blue Version. Find in Route 23, 4, 9, 8, or 11

24. Arbok
Poison
Not in Blue Version. Find in Route 23 or the Unknown Dungeon

25. Pikachu
Electric
Found in the Viridian Forest or Power Plant
 
26. Raichu
Electric
Evolves from Pikachu with the Thunder Stone or find in the Power
Plant, Unknown Dungeon, or Route 23

27. Sandshrew
Ground
Find in Route 23, 11, 8, 4, or 9

28. Sandslash
Ground
Cannot be found in red version. Evolves from Sandshrew at level 22 or
find in the Unknown Dungeon or Route 23.

29. Nidoran female
Poison
Find in Safari Zone or Route 22

30. Nidorina
Poison
Find in Safari Zone, Route 8, or at the Game Corner

31. Nidoqueen
Poison/ Ground
Evolves from Nidorina with the Moon Stone

32. Nidoran Male
Poison
Found in Safari Zone or Route 22

33. Nidorino
Poison
Win at Game Corner or find in Safari Zone

34. Nidoking
Poison/ Ground
Evolves from Nidorina with Moon Stone

35. Clefairy
Normal
Win in Game Corner, or find in Mt. Moon

36. Clefable
Normal
Evolves from Clefairy with Moon Stone

37. Vulpix
Fire
Cannot be caught in Red Version. Find on Cinnabar island, or Routes 8
or 7

38. Ninetales
Fire
Evolves from Vulpix with Moon Stone

39. Jigglypuff
Normal
Found in Route 3

40. Wigglutuff
Normal
Find in Unknown Dungeon or evolves from Jigglypuff with Moon Stone

41. Zubat
Poison/ Flying
Find in Mt. Moon, Rock Tunnel, or Seafoam Islands

42. Golbat
Poison/ Flying
Find in Seafoam Islands, Route 23, or evolves from Zubat at level 22

43. Oddish
Grass/ Poison
Cannot be found in Blue Version. Find in Routes 5, 7, 6, 24, 25, 12,
13, 14, or 15.

44. Gloom
Grass/ Poison
Cannot be found in Blue Version. Evolves from Oddish at level 21, or
find or Routes 12, 13, 14, or 15

45. Vileplume
Grass/ Poison
Evolves from Gloom with Leaf Stone

46. Paras
Bug/ Grass
Find in Safari Zone or Mt. Moon

47. Parasect
Bug/ Grass
Evolves from Paras at level 24 or find in Safari Zone or Unknown
Dungeon 

48. Venonat
Bug/ Poison
Find in Safari Zone or Routes 12, 13, 14, or 15

49. Venomoth
Bug/ Posion
Evolves from Venonat at level 31 or find in Unknown Dungeon, Victory
Road, or Safari Zone

50. Diglett
Ground
Find in Diglett's Cave (DUH)

51. Dugtrio
Ground
Find in Digletts Cave or evolves from Diglett at level 26

52. Meowth
Normal
Can't be caught in Red. Find in Routes 5, 6, 7, or 8

53. Persian
Normal
Evolves from Meowth at level 28

54. Psyduck
Water
Fish in Safari Zone or find in Seafoam Islands, Route 4, 24, 29, or
fish in Cerulean City

55. Golduck
Water
Evolves from Psyduck at level 33 or find in Seafoam Islands

56. Mankey
Fighting
Can't be caught in Blue. Find in Routes 5, 6, 7, or 8

57. Primeape
Fighting
Evolves from Mankey at level 28

58. Growlithe
Fire
Can't be found in Blue. Find on Cinnabar Island, or in Routes 7 or 8

59. Arcanine
Fire
Evolves from Growlithe with the Fire Stone

60. Poliwag
Water
Fish in Pallet Town, Viridian City, Route 22, or Vermillion City

61. Poliwhirl
Water
Evolves from Poliwag at level 25 or fish in Celadon City or Route 9

62. Poliwrath
Water/ Fighting
Evolves from Poliwhirl with a Water Stone

63. Abra
Phychic
Win in the Game Corner or find in Routes 24 and 25

64. Kadabra
Psychic
Evolves from Abra at level 16 or find in the Unknown Dungeon

65. Alakazam
Psychic
This one evolves from Kadabra only after he passes through a game link
(trading)

66. Machop
Fighting
Find in Rock Tunnel or Victory Road

67. Machoke
Fighting
Evolves from Machop at level 28 or find in Victory Road

68. Machamp
Fighting
Evolves from Machoke after traded through a game link

69. Bellsprout
Grass/ Poison
Can't be caught in Red. Find in Routes 6, 7, 12, 13, 14, 15, 24, or 25

70. Weepinbell
Grass/ Posion
Can't be caught in Red. Evolves from Bellsprout at level 21 or find in
routes 12, 13, 14, or 15

71. Victreebell
Grass/ Poison
Evolves from Weepinbell with a Leaf Stone

72. Tentacool
Water/ Poison
Find in Routes 12, 13, 17, 18, 19, 20, or fish in Pallet Town

73. Tentacruel
Water/ Poison
Evolves from Tentacool at level 30

74. Geodude
Rock/ Ground
Find in Victory Road, Rock Tunnel, or Mt. Moon

75. Graveler
Rock/ Ground
Evolves from Geodude at level 25 or find on Victory Road

76. Golem
Rock/ Ground
Evolves from Graveler when passed through a cable link

77. Ponyta
Fire
Catch on Cinnabar Island

78. Rapidash
Fire
Evolves from Ponyta at level 40 or find in the Unknown Dungeon

79. Slowpoke
Water/ Phychic
Fish in Celadon City, Safari Zone, Cinnabar Island, Route 9 or 10, or
find in Seafoam Islands

80. Slowbro
Water/ Psychic
Evolves from Slowpoke at level 37 or find in Route 23, Unknown
Dungeon, or Seafoam Island

81. Magnemite
Electric
Find in Unknown Dungeon or Power Plant

82. Megneton
Electric
Evolves from Magnemite at Level 30 or find in Unknown Dungeon or Power
Plant

83. Farfetche'd
Normal/ Flying
Trade in the building right of where you get the Bike Voucher in
Vermilion City

84. Doduo
Normal/ Flying
Find in Routes 16, 17, 18 or find in Safari Zone

85. Dodrio
Normal/ Flying
Evolves from Doduo at level 31 or find in the Unknown Dungeon

86. Seel
Water
Find in Seafoam Islands or Cinnabar Island

87. Dewgong
Water/ Ice
Evolves from Seel at level 34 or find in Seafoam Islands

88. Grimer
Posion
Find in Cinnabar's Mansion

89. Muk
Poison
Evolves from Grimer at level 38 or find in Cinnabar Mansion or the
Unknown Dungeon

90. Shellder
Water
Fish in Vemilion City or Routes 6, 19, 20, or 21

91. Cloyster
Water/ Ice
Evolves from Shellder with Water Stone 

92. Gastly
Ghost/ Poison
Find in Lavender Town's tower

93. Haunter
Ghost/ Poison
Evolves from Gastly at level 25 or find in Lavender Town's tower

94. Gengar
Ghost/ Poison
Pass a Haunter through a game link

95. Onix
Rock/ Ground
Find on Victory Road or Rock Tunnel

96. Drowzee
Phychic
Find in Route 11

97. Hypno
Psychic
Evolves from Drowsee at level 26 or find in the Unknown Dungeon

98. Krabby
Water
Fish almost anywhere, escpecialy Routes 4, 11, 12, 13, 17, 18, or 25

99. Kingler
Water
Evolves from Krabby at level 28 or find in Seafoam or fish in Unknown
Dungeon

100. Voltorb
Electric
Find in Power Plant or Route 9

101. Electrode
Electric
Find in Cinnabar's Mansion, Power Plant, or Unknown Dugeon

102. Exeggcute
Grass/ Psychic
Find in Safari Zone

103. Exeggcutor
Grass/ Psychic
Evolves from Exeggcute with the Leaf Stone

104. Cubone
Ground
Find in Lavender Town's tower

105. Marowak
Ground
Evolves from Cubone at 28 or find in Victory Road or Unknown Dungeon 

106. Hitmonlee
Fighting
One of your choices after beating Saffron City's first Gym

107. Hitmonchan
Fighting
One of your choices after beating Saffron City's first Gym

108. Lickitung
Normal
Trade for in Route 18's tower

109. Koffing
Poison
Find in Cinnabar's Mansion

110. Weezing
Poison
Evolves from Koffing at level 35 or find in Cinnabar's Mansion

111. Rhyhorn
Ground/ Rock
Catch in Safari Zone

112. Rhydon
Ground/ Rock
Evolves from Rhyhorn at level 42 or find in Unknown Dungeon

113. Chansey
Normal
Find in Safari Zone or Unknown Dungeon

114. Tangela
Grass
Trade for in the lab or catch in Route 21

115. Kangashan
Normal
Find in Safari Zone

116. Horsea 
Water
Fish in Cinnabar Island, Routes 21, 19, 20, and Celadon or find in
Seafoam

117. Seadra
Water
Find in Seafoam or fish in Route 23 or Unknown Dungeon  

118. Goldeen
Water
Fish in Routes 24, 25, 4, 11, 12, 18, 19, 20, 21, or 22

119. Seaking
Water
Evolves from Goldeen at 33 or find in Unknown Dungeon or Route 23

120. Staryu
Water
Fish in Routes 19, 20, 21, Cinnabar Island or find in Seafoam Islands

121. Starmie
Water/ Psychic
Evolves from Staryu with a Water Stone

122. Mr. Mime
Psychic
Trade for in a house on Route 2 after Diglett's Cave

123. Scyther
Bug/ Flying
Can't be found in Blue. Win in the Game Corner or find at Safari Zone

124. Jynx
Ice/ Psychic
Trade for in northern Cerulan City

125. Electabuzz
Electric
Can't be found in Blue. Catch at Power Plant

126. Magmar
Fire
Can't be caught in Red. Find in Cinnabar's Mansion

127. Pinsir
Bug
Can't be caught in Red. Win in the Game Corner or find at Safari Zone

128. Tauros
Normal
Catch in Safari Zone

129. Magikarp
Water
Fish in 12, 13, 17, 18 or Fushia City

130. Gyrados
Water/ Flying
Evolves from Magikarp at level 20

131. Lapras
Water/ Ice
Get at the end of Saffron City's Silph Co. building

132. Ditto
Normal
Find in Unknown Dungeon or Routes 13, 14, 15 or 23

133. Eevee
Normal
Go though the back of Celadon's Mansion and go up

134. Vaporeon
Water
Evolves from Eevee with a Water Stone

135. Jolteon
Electric
Evolves from Eevee with a Thunder Stone

136. Flareon
Fire
Evolves from Eevee with a Fire Stone

137. Porygon
Normal
Win at Game Corner

138. Omanyte
Rock/ Water
Choose the Helix Fossil and give to the lab at Cinnabar

139. Omastar
Rock/ Water
Evolves from Omanyte at level 40

140. Kabuto
Rock/ Water
Choose the Dome Fossil and give to the lab at Cinnabar

141. Kabutops
Rock/ Water
Evolves from Kabuto at level 40

142. Aerodactyl
Rock/ Flying
Use Cut to get behind the Museum. Give the Old Amber to Cinnabar's lab 

143. Snorlax
Normal
Wake up a Snorlax at Route 16 or 12

144. Articuno
Ice/ Flying
Find at the end of Seafoam Islands

145. Zapdos
Electric/ Flying
Find at the end of Power Plant

146. Moltres
Fire/ Flying
Find at the end of Victory Road

147. Dratini
Dragon
Win in Game Corner or catch in Safari Zone

148. Dragonair
Dragon
Evolves from Dratini at level 30

149. Dragonite
Dragon/ Flying
Evolves from Dragonair at level 55

150. Mewtwo
Psychic
The big, bad, bestest! Find at the end of the Unknown Dungeon

151. Mew
Unknown
Doesn't exist so far. Don't worry if you hear rumours about a truck
that you push with strength- their all fake! You can, though, use a
Game Genie or Game Shark to get him.

Items

Antidote-Cures Poison
Awakening-Cures Sleep
Bicycle-Makes you travle faster
Bike Voucher-Trade in for a free bike
Burn Heal-Heals Burns
Calcium-Increases Special rating
Carbos-Increases Speed rating
Card Key-Opens Silph Co. doors
Coin-Used to use the slot machines
Coin Case-Holds coins
Dire Hit-Increase the effect of attacks
Dome Fossil-Used to clone Kabuto
Elixer-Gives 10PP to all abilities
Escape Rope-Pulls you out of buildings and caves
Ether-Gives 10PP to one ability
Exp. All-Shares exp. with other Pokemon
Fire Stone-Triggers evolution
Fresh Water-Restores 50HP
Full Heal-Cures any condition
Full Restore-Cures, restores all HP
Gold Teeth-Give to Safari Zone Warden
Good Rod-Used to fish
Great Ball-Stronger than a Poke Ball
Guard Spec-Disable Special Attacks
Helix Fossil-Used to clone Omanyte
HP Up-Raises HP meter by one
Hyper Potion-Restores 200HP 
Ice Heal-Thaws frozen Pokemon
Iron-Increases Defense rating
Item Finder-Finds hidden items
Leaf Stone-Triggers evolution
Lemonade-Restores 80HP
Lift Key-Activates elevator
Master Ball-Foolproof Poke Ball
Max Elixer-Restores all PP
Max Ether-Restores all PP to one ability
Max Potion-Restores all HP
Max Repel-Stops random attacks
Max Revive-Revives, restores all HP
Moon Stone-Triggers evolution
Nugget-Useless, sell for 5,000
Oak's Parcel-Deliver to Prof. Oak
Old Amber-Used to clone Areodactyl
Old Rod-Used to fish
Paralyze Heal-Cures Paralyze
Poke Ball-Used to catch Pokemon
Poke Doll-Distracts opponent
Poke Flute-Wakes sleeping Pokemon
Pokedex-Used to store Pokemon data
Potion-Restores 20HP
PP Up-Raises PP meter by one
Protein-Increase Attack rating
Rare Candy-Raises Exp. Level by one
Repel-Stops random attacks
Revive-Revives fainted Pokemon
S.S. Ticket-Used to get on the S.S. Anne
Safari Ball-Used to catch Safari Zone Pokemon
Secret Key-OpensCinnabar Island Gym
Silph Scope-Let's you see ghost Pokemon

Soda Pop-Restores 60HP
Super Potion-Restores 50HP
Super Repel-Prevents random attacks
Super Rod-Used to fish
Thunder Stone-Triggers evolution
Town Map-Map of the game
Ultra Ball-Better than a Great Ball
Water Stone-Triggers evolution
X Accuracy-Raises Acuracy
X Attack-Raises Attack
X Defend-Raises Defense
X Special-Raises Special
X Speed-Raises Speed