The complete Pokemon Diamond and Pearl pokedex, part 7

Pokémon Name: Finneon
Type: Water / Steel
Classification: Hop Fish
Pokédex Number: 134 Sinnoh / 456 National
Ability: Swift Swim – Doubles Speed in the rain; Storm Drain – All Water-type attacks are drawn in
Useful Attacks: Water Pulse
Dream World ability: Water Veil – user cannot be burned
Location Found:
D/P/P: Fished w/ Good Rod, various locations
HG/SS: Pokewalker - Stormy Beach
B/W: Routes 17 and 18 (via Fishing)

Finneon is an uncommon and colorful fish found in the rivers of Sinnoh. It's a hardy fish, and one of a relatively small number of new Water Pokémon in Diamond and Pearl, and has a variety of useful Water-type moves, among others. Perhaps most intriguing, though, is its Storm Drain ability – this ability can be a powerful strategic boon in two-on-two Pokémon battles. Send Finneon out with a Fire- or Ground- type Pokémon, and any Water-type attacks will only hit the fish for minimal damage, protecting the other. Just hope they don't have a Grass-type on hand, too.

Evolves into Lumineon at Level 31.