On water, there are many rocks and Trainers, and in the center of Route 230, there is an island with many items and the possibility of capturing a Togepi using the Poké Radar. In addition, Corsola can be found swarming here.
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.
A colored background means that the Pokémon can be found in this location in the specified game. A white background with a colored letter means that the Pokémon cannot be found here.
Trainers with a Vs. Seeker by their names, when alerted for a rematch using the item, may use higher-level Pokémon.
Trivia
Route 230 bears numerous similarities to Route 130 in Hoenn: both routes have numbers that end in 30, they are both east-west sea routes with no north or south exits, and both contain an island with grass, stairs, and a place to plant Berries. This island is also the only place to encounter a certain baby Pokémon in the wild (Wynaut on Route 130, Togepi on Route 230). However, in Route 130's case, Mirage Island isn't always there.
Route 230 is the highest-numbered route in the Pokémon games so far.