You have to battle every Pokemon Trainer in Sinnoh.
there is no fast way without the use of a action replay
easy by using a action replay
finish sinnoh pokedex
finish sinnoh pokedex
no
You have to have national pokedex.
Finish the sinnoh pokedex and talk to the profesor
in the sinnoh pokedex u dont need to c heatran he is only obtainable after u get the national dex
yes its easy
how do you et national pokedex in Pokemon pearl? finish your sinnoh pokedex and either proffessor rowan will give you the national pokedex, or prof. oak
first you have to finish the sinnoh pokedex.then you show your work to professer rowan
You don't have to see Heatran in order to complete it.