The complete Pokemon Diamond and Pearl pokedex, part 7

Pokémon Name: Mantyke
Type: Water / Flying
Classification: Kite
Pokédex Number: 140 Sinnoh / 458 National
Ability: Swift Swim – Increases speed when raining; Water Absorb – Heals when hit by Water-type attacks
Dream World ability: Water Veil – user cannot be burned
Location Found:
Diamond/Pearl: Route 223 and Sunyshore City (via Surfing)
Platinum: Route 223 (via Surfing)
D/P/P/HG/SS: Bred from Mantine, while holding the Small Wave incense
B/W: Undella Town, Undella Bay (via Surf)

One doesn't usually think of mantas as being cute, but Mantyke is definitely the exception. This little flying fish inhabits the waters leading to the Elite Four's Victory Road, and are few and far between, so be sure to catch it if you ever see one. Mantine, Mantyke's evolved form, is famous for the Remoraid clinging to its fin. As such, for Mantyke to evolve, it must simply level up while you're carrying a Remoraid, and the fusion evolution will be complete.

Evolve to Mantine by leveling while carrying a Remoraid.