Rotom, He can be found in a flickering tv in one of the back rooms in the haunted house in the Eterna forest.
Rotom
Picachu
yes but sinnoh
Rotom
There is no number 152 in the Sinnoh Pokedex however number 152 in the National Pokedex is Chikorita.
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.
Sinnoh Dex #152 -- Rotom National Dex #152 -- Chikorita
number 152 is rotom and you can catch him by going to the old cheatue
In the sinnoh pokedex rotom is number 152 but in the national pokedex rotom is number 479 and chickorita is number 152
Rotom is #152 in the Sinnoh Dex in Pokémon Platinum, you can find it by interacting with a TV in the Old Chateau in Eterna Forest during the in-game time of night which is between 8 PM and 4 AM.
Rotom is the Sinnoh (platinum) region #152, obtainable in the Old Chateau at night (by interacting with the tv in one of the rooms)
sinnoh pokedex: manaphy, rotom national pokedex: don't have it yet