Route 107

Available Pokemon by surfing:
Tentacool
Wingull
Pelipper

Available Pokemon by surfing after obtaining the National Dex:
Krabby
Frillish
Skrelp
Clauncher

Available Pokemon by fishing:
Old Rod:
Magikarp
Tentacool

Good rod:
Magikarp
Tentacool
Wailmer

Super Rod:
Wailmer

Available Pokemon by going underwater:
Chinchou
Clamperl
Lanturn
Relicanth

Available items:
Super Repel
Flame Plate - requires Surf and Dive
Yellow Shard - requires Surf and Dive