That Pokemon is Rotom and There is only one way to actually see it and that's by battling it. You can find it in the old Chateau. Its upstairs in the room with a TV press A against it to battle it :Note: you must have the HM cut to get inside the Chateau
= 152
I believe you are talking about mew or mewtwo
151 manapy 152 rotom
yes but sinnoh
rotom
You find 152(Rotom) at the old Chateau on the second level in the second room. Hope this helps:)
Pokemon 152 is Chickoreta
Rotom.
In Pokemon platinum this pokémon would be Rotom. You find him in Old Chatau in Eterna Forest.
Sinnoh Dex #152 -- Rotom National Dex #152 -- Chikorita
rotom
Rotom