I think you are supposed to turn in the pokedex with all Pokemon except rotom then go to the tv and you should get rotom soooooooooooooo no
Rotom is #479 in the national pokedex, and it is an Electric-Ghost type Pokemon.
in the national pokedex, it is chikorita, and in the sinnoh pokedex, it is rotom
Rotom.
For the Sinnoh Pokedex: Rotom For the National Pokedex: Chikorita
Im not positive that you can get rotom before the national pokedex but in the old chateau. In one of the rooms he is in the TV
Rotom comes out only at nighttime from the TV in the Old Chateau on Pokémon Diamond, Pearl and Platinum. You also need the National Pokedex for Rotom to appear.
478 is the Pokemon froslass which is right before rotom on the national pokedex. and 485 is the Pokemon heatran which is right after palkia on the national pokedex.
In the sinnoh pokedex rotom is number 152 but in the national pokedex rotom is number 479 and chickorita is number 152
you need the national pokedex and at 8(pm)-12(am) then go to the old cheatu and press A on the tv and press "yes"and rotom will appear
152: rotom (platinum pokedex) 152:chickorita (national pokedex) you can catch rotom when you examine the tv in old chateau between 8pm and 3:59am
rotom(legendary)
no because they are all the same