151 is Manaphy and can be found by looking at the book in Mr. Backlot's room in the Pokemon mansion on route 212.
Swinub is #203 in the Sinnoh Dex in Pokémon Platinum.
wormadam
Dusclops
its a cascoon
happiny
Swinub is #203 in the Sinnoh Dex in Pokémon Platinum.
It is Leafeon.
happiny
wormadam
Dusclops
Vaporeon.
its a cascoon
Wormadam
Pokemon Platinum has two different Pokedexes: the Sinnoh dex and the National Pokedex. In the Sinnoh dex, #152 is Rotom. In the National Pokedex, it's Chikorita.
porygon
Rotom
Glaceon