The complete Pokemon Diamond and Pearl pokedex, part 8

Pokémon Name: Yanmega
Type: Bug / Flying
Classification: Demonfly
Pokédex Number: 469 National
Ability: Speed Boost - Speed automatically increases every turn; Color Glasses – Increases the power of ineffective attacks after they've been used once
Dream World ability: Frisk – Reveals the opponent's hold item
Useful Attacks: Bug Buzz
Location Found:
D/P/P/HG/SS: Evolves from Yanma when leveled up with AncientPower in moveset
B/W: Evolve Yanma

Eons ago, flies were the size of Volkswagons... or something. Well, when Yanma learns AncientPower, it grows to a similarly vehicular size and improves greatly in every regard. Most impressive is its Speed Boost move, previously the sole domain of locust Pokémon, Ninjask, which makes it faster every turn. Yanmega learns a number of powerful moves, including a powerful new Bug-type move, Bug Buzz.