The National Pokdex in Pokmon Platinum is a comprehensive list of all 493 Pokmon available in the game. It is obtained after completing the Sinnoh Pokdex by talking to Professor Oak in Sandgem Town. The National Pokdex allows players to catch and trade Pokmon that are not found in the Sinnoh region, including legendary and mythical Pokmon.
Completing the National Pokdex is a challenging but rewarding task. It requires players to travel all over the Sinnoh region and interact with other players to obtain all of the different Pokmon. Completing the National Pokdex also unlocks special features in the game, such as the ability to rematch Gym Leaders and access new areas.
