Pokémon Red and Blue/Route 19-20

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New Pokémon Available
Red Blue Yellow
Fish:
Horsea
none

Head south from Fuchsia City to the beach. Paddle south and west along Routes #19 and #20 until you reach the sunny shores of Seafoam Island. You'll have to make your way through the cave to continue. Alternatively, you can Fly back to Cinnabar Island and approach Seafoam Island from the west along Route #20.

Route #19 & #20 encounters
Tentacool 100% 100% 100%

[edit] Let's go Surfing now

Route 19
ASwimmerFile:Pokebuck.png145
GoldeenLV29
HorseaLV29
StaryuLV29
9SwimmerFile:Pokebuck.png150
TentacoolLV30
ShellderLV30
8SwimmerFile:Pokebuck.png150
HorseaLV30
HorseaLV30
7SwimmerFile:Pokebuck.png150
PoliwagLV30
PoliwhirlLV30
6SwimmerFile:Pokebuck.png135
HorseaLV27
TentacoolLV27
TentacoolLV27
GoldeenLV27
5SwimmerFile:Pokebuck.png145
GoldeenLV29
ShellderLV29
SeakingLV29
4SwimmerFile:Pokebuck.png210
GoldeenLV30
SeakingLV30
3BeautyFile:Pokebuck.png2030
StaryuLV29
StaryuLV29
StaryuLV29
2SwimmerFile:Pokebuck.png135
TentacoolLV27
TentacoolLV27
StaryuLV27
HorseaLV27
TentacruelLV27
1BeautyFile:Pokebuck.png1890
PoliwagLV27
GoldeenLV27
SeakingLV27
GoldeenLV27
PoliwagLV27

You could do the Seafoam Island dungeon before the Power Plant, but then you'd be depriving yourself of the pleasures of tearing through it with Zapdos' powerful lightning blasts.

The Island can be reached by either heading south from Fuchsia or east from Cinnabar. Yellow players will notice a new house on the beach near Fuchsia: This is Pikachu's Summer Beach, where players with a "Surfing Pikachu" can play a surfing mini-game.

[edit] Pikachu's Summer Beach

When, in the course of Pokémon events, a special Pokémon appears on the scene, it's time to party surfer-style. Its origins are shrouded in mystery, legend has it that a special "Surfing Pikachu" exists that can not only Surf but also use Water-type attacks in battle. Surfing Pikachu can't be caught in the game, but there is another way to get him (check the spoiler at the very bottom of the page). If you're a lucky owner of one of these ultra-rare creatures, there's a surprise waiting for you. In Yellow, there's a nondescript house on the shore below Fuchsia City. If you go in with Surfing Pikachu, a kind bro named Dude will ask you if you want to surf. If you accept, you can catch gnarly air in the waves with Pikachu! As the waves scroll by, you'll be given points based on the number of radical stunts you can do off the top of the wave crests. You can head back to the hut to view your highest surfing scores, and even print them out with the Game Boy Printer!

Route 20
1BeautyFile:Pokebuck.png2170
PoliwagLV31
SeakingLV31
SeakingLV31
2BeautyFile:Pokebuck.png2100
ShellderLV30
ShellderLV30
CloysterLV30
3Jr. Trainer(Female)File:Pokebuck.png620
GoldeenLV31
SeakingLV31
4BirdkeeperFile:Pokebuck.png750
FearowLV30
FearowLV30
PidgeottoLV30
5SwimmerFile:Pokebuck.png175
StaryuLV35
6BeautyFile:Pokebuck.png2100
SeadraLV30
HorseaLV30
SeadraLV30
7SwimmerFile:Pokebuck.png155
ShellderLV31
CloysterLV31
8SwimmerFile:Pokebuck.png140
HorseaLV28
HorseaLV28
SeadraLV28
HorseaLV28