This already has an answer but I wanted to post one more detailed. The formatting for this is: (Pokemon/Games/Location (rods only)/Levels/Rate)
One Island
Town
Surfing
Tentacool/FRLG/5-40/95%
Tentacruel/FRLG/35-40/5%
Fishing
Magikarp/FRLG/Old Rod/5/100%
Horsea/FR/Good Rod/5-15/80%
Krabby/LG/Good Rod/5-15/80%
Magikarp/FRLG/Good Rod/5-15/20%
Shellder/FR/Super Rod/15-25/40%
Horsea/FR/Super Rod/15-25/40%
Krabby/LG/Super Rod/15-25/40%
Staryu/LG/Super Rod/15-25/40%
Gyarados/FRLG/Super Rod/15-25/15%
Seadra/FR/Super Rod/25-35/4%
Kingler/LG/Super Rod/25-35/4%
Psyduck/FR/Super Rod/25-35/1%
Slowpoke/LG/Super Rod/25-35/1%
Treasure Beach
Grass
Spearow/FRLG/31-32/30%
Fearow/FRLG/36, 38, 40/20%
Meowth/FRLG/31/10%
Persian/FRLG/37, 40/5%
Psyduck/FR/31/5%
Slowpoke/LG/31/5%
Tangela/FRLG/33, 35/30%
Surfing
Tentacool/FRLG/5-40/95%
Tentacruel/FRLG/35-40/5%
Fishing
Magikarp/FRLG/Old Rod/5/100%
Krabby/LG/Good Rod/5-15/80%
Horsea/FR/Good Rod/5-15/80%
Magikarp/FRLG/Good Rod/5-15/20%
Psyduck/FR/Super Rod/25-35/1%
Slowpoke/LG/Super Rod/25-35/1%
Krabby/LG/Super Rod/15-25/80%
Kingler/LG/Super Rod/25-35/4%
Horsea/FR/Super Rod/15-25/80%
Seadra/FR/Super Rod/25-35/4%
Gyarados/FRLG/Super Rod/15-25/15%
Kindle Road
Grass
Spearow/FRLG/30, 32/25%
Fearow/FRLG/36/10%
Meowth/FRLG/31/10%
Persian/FRLG/37, 40/5%
Psyduck/FR/34/5%
Geodude/FRLG/31/10%
Ponyta/FRLG/31, 34/30%
Rapidash/FRLG/37, 40/5%
Slowpoke/LG/34/5%
Surfing
Tentacool/FRLG/5-40/95%
Tentacruel/FRLG/35-40/5%
Fishing
Magikarp/FRLG/Old Rod/5/100%
Krabby/LG/Good Rod/5-15/80%
Horsea/FR/Good Rod/5-15/80%
Magikarp/FRLG/Good Rod/5-15/20%
Psyduck/FR/Super Rod/25-35/1%
Slowpoke/LG/Super Rod/25-35/1%
Krabby/LG/Super Rod/15-25/80%
Kingler/LG/Super Rod/25-35/4%
Horsea/FR/Super Rod/15-25/80%
Seadra/FR/Super Rod/25-35/4%
Gyarados/FRLG/Super Rod/15-25/15%
Rock Smash
Geodude/FRLG/5-30/95%
Graveler/FRLG/25-40/5%
Mt. Ember
Grass
Spearow/FR/30, 32/15%
Spearow/LG/32/10%
Fearow/FRLG/38, 40/25%
Machop/FRLG,35/10%
Geodude/FRLG/33/10%
Ponyta/FRLG/30, 33, 36/35%
Rapidash/FRLG/39, 42/5%
Magmar/LG/38, 40/5%
Rock Smash
Geodude/FRLG/5-30/95%
Graveler/FRLG/25-40/5%
- Summit Path Rooms 1 and 3
Cave
Machop/FRLG/31, 33, 35, 37, 39/50%
Geodude/FRLG/29, 31, 33, 35, 37/50%
Cave
Machop/FRLG/32, 34, 36/40%
Geodude/FRLG/30, 32, 34/40%
Machoke/FRLG/38, 40/20%
Rock Smash
Geodude/FRLG/5-30/95%
Graveler/FRLG/25-40/5%
Rock Smash
Geodude/FRLG/5-30/95%
Graveler/FRLG/25-40/5%
Summit
Moltres/FRLG/Level 50
Moltres will respawn if you run from it and leave the area.
Cave
Geodude/FRLG/32, 34, 36, 38, 40/50%
Machop/FRLG/34, 36, 38/40%
Machoke/FRLG/40, 42/10%
Rock Smash
Geodude/FRLG/25-40/65%
Graveler/FRLG/30-50/35%
Cave
Geodude/FRLG/34, 36, 38, 40, 42/70%
Slugma/FRLG/24, 26, 28, 30/30%
Rock Smash
Geodude/FRLG/25-40/65%
Graveler/FRLG/30-50/35%
Cave
Slugma/FRLG/22, 24, 26, 28, 30, 32/60%
Geodude/FRLG/40, 42, 44/40%
Rock Smash
Geodude/FRLG/25-40/65%
Graveler/FRLG/30-50/35%
Cave
Slugma/FRLG/18, 20, 22, 24, 26, 28, 30, 32, 34, 36/100%
Rock Smash
Slugma/FRLG/15-35/90%
Magcargo/FRLG/25-40/10%
Source, Source, Source, and Source.
Two Island
Cape Brink
Grass
Spearow/FRLG/31/20%
Fearow/FRLG/36/10%
Oddish/FR/30, 32/30%
Gloom/FR/36, 38/15%
Meowth/FRLG/31/10%
Persian/FRLG/37, 40/5%
Psyduck/FR/31/5%
Golduck/FR/37, 40/5%
Bellsprout/LG/30, 32/30%
Weepinbell/LG/36, 38/15%
Slowpoke/LG/31/5%
Slowbro/LG/37, 40/5%
Surfing
Psyduck/FR/5-40/95%
Golduck/FR/35-40/5%
Slowpoke/LG/5-40/95%
Slowbro/LG/35-40/5%
Fishing
Magikarp/FRLG/Old Rod/5/100%
Poliwag/FRLG/Good Rod/5-15/60%
Goldeen/FRLG/Good Rod/5-15/20%
Magikarp/FRLG/Good Rod/5-15/20%
Psyduck/FR/Super Rod/15-35/5%
Poliwag/FRLG/Super Rod/15-25/40%
Poliwhirl/FRLG/Super Rod/20-30/40%
Slowpoke/LG/Super Rod/15-35/5%
Gyarados/FRLG/Super Rod/15-25/15%
Source
Three Island
Three Isle Port
Dunsparce/FRLG/Grass/5, 10, 15, 20, 25, 30, 35/100%
Bond Bridge
Grass
Pidgey/FRLG/29, 32/30%
Pidgeotto/FRLG/34, 37, 40/15%
Oddish/FR/31/20%
Gloom/FR/36/10%
Venonat/FRLG/34/5%
Meowth/FRLG/31/10%
Persian/FRLG/37, 40/5%
Psyduck/FR/31/5%
Bellsprout/LG/31/20%
Weepinbell/LG/36/10%
Slowpoke/LG/31/5%
Surfing
Tentacool/FRLG/5-40/95%
Tentacruel/FRLG/35-40/5%
Fishing
Magikarp/FRLG/Old Rod/5/100%
Krabby/LG/Good Rod/5-15/80%
Horsea/FR/Good Rod/5-15/80%
Magikarp/FRLG/Good Rod/5-15/20%
Psyduck/FR/Super Rod/25-35/1%
Slowpoke/LG/Super Rod/25-35/1%
Krabby/LG/Super Rod/15-25/80%
Kingler/LG/Super Rod/25-35/4%
Horsea/FR/Super Rod/15-25/80%
Seadra/FR/Super Rod/25-35/4%
Gyarados/FRLG/Super Rod/15-25/15%
Berry Forest
Grass
Pidgey/FRLG/32/10%
Pidgeotto/FRLG/37/20%
Oddish/FR/30/10%
Gloom/FR/35/20%
Venonat/FRLG/34/10%
Venomoth/FRLG/37, 40/5%
Psyduck/FR/31/5%
Bellsprout/LG/30/10%
Weepinbell/LG/35/5%
Slowpoke/LG/31/5%
Drowzee/FRLG/34/10%
Hypno/FRLG/37, 40/5%
Exeggcute/FRLG/35/5%
Surfing
Psyduck/FR/5-40/95%
Golduck/FR/35-40/5%
Slowpoke/LG/5-40/95%
Slowbro/LG/35-40/5%
Fishing
Magikarp/FRLG/Old Rod/5/100%
Poliwag/Good Rod/5-15/20%
Goldeen/FRLG/Good Rod/5-15/60%
Magikarp/FRLG/Good Rod/5-15/20%
Psyduck/FR/Super Rod/15-35/5%
Slowpoke/LG/15-35/5%
Goldeen/FRLG/Super Rod/40%
Seaking/FRLG/Super Rod/20-30/40%
Gyarados/FRLG/Super Rod/15-25/15%
Hypno/FRLG/Level 30
Source, Source, and Source.
Four Island
Town
Surfing
Wooper/FR/5-25/70%
Marill/LG/5-25%/70%
Psyduck/FR/5-35/30%
Slowpoke/LG/5-35/30%
Fishing
Magikarp/FRLG/Old Rod/5/100%
Poliwag/FRLG/Good Rod/5-15/60%
Goldeen/FRLG/Good Rod/5-15%/20%
Magikarp/FRLG/Good Rod/5-15%/20%
Poliwag/FRLG/Super Rod/15-25/40%
Poliwhirl/FRLG/Super Rod/20-30%/40%
Gyarados/FRLG/Super Rod/15-25/15%
Psyduck/FR/Super Rod/15-35/5%
Slowpoke/LG/Super Rod/15-35/5%
Icefall Cave
Cave
Seel/FRLG/43, 45, 47/40%
Golbat/FRLG/45, 48/25%
Dewgong/FRLG/49, 51, 53/20%
Zubat/FRLG/40/10%
Psyduck/FR/41/5%
Slowpoke/LG/41/5%
Surfing
Seel/FRLG/5-35/60%
Psyduck/FR/5-35/30%
Slowpoke/LG/5-35/30%
Dewgong/FRLG/35-40/5%
Wooper/FR/5-15/5%
Marill/LG/5-15/5%
Fishing
Magikarp/FRLG/Old Rod/5/100%
Poliwag/FRLG/Good Rod/5-15/60%
Goldeen/FRLG/Good Rod/5-15%/20%
Magikarp/FRLG/Good Rod/5-15%/20%
Poliwag/FRLG/Super Rod/15-25/40%
Poliwhirl/FRLG/Super Rod/20-30%/40%
Gyarados/FRLG/Super Rod/15-25/15%
Psyduck/FR/Super Rod/15-35/5%
Slowpoke/LG/Super Rod/15-35/5%
Cave
Swinub/FRLG/23, 25, 27, 29, 31/50%
Golbat/FRLG/45, 48/25%
Zubat/FRLG/40/10%
Seel/FRLG/45/10%
Delibird/FR/30/5%
Sneasel/LG/30/5%
Cave
Seel/FRLG/43, 45, 47/40%
Golbat/FRLG/45, 48/25%
Dewgong/FRLG/49, 51, 53/20%
Zubat/FRLG/40/10%
Psyduck/FR/41/5%
Slowpoke/LG/41/5%
Surfing
Tentacool/FRLG/5-45/95%
Tentacruel/FRLG/35-45/4%
Lapras/FRLG/30-45/1%
Fishing
Magikarp/FRLG/Old Rod/5/100%
Horsea/FR/Good Rod/5-15/80%
Krabby/LG/Good Rod/5-15/80%
Magikarp/FRLG/Good Rod/5-15/20%
Shellder/FR/Super Rod/15-25/40%
Horsea/FR/Super Rod/15-25/40%
Krabby/LG/Super Rod/15-25/40%
Staryu/LG/Super Rod/15-25/40%
Gyarados/FRLG/Super Rod/15-25/15%
Seadra/FR/Super Rod/25-35/4%
Kingler/LG/Super Rod/25-35/4%
Psyduck/FR/Super Rod/25-35/1%
Slowpoke/LG/Super Rod/25-35/1%
Source and Source.