You don't have to see Heatran in order to complete it.
route 222 diamond/pearl - battle the sailors platinum battle - the 3rd fisherman from the left
first of all, there is a cheat book that shows you all the Pokemon from your normal pokedex. But if you're sure, then go back to professor rowan, and talk to him.
Unfortunatley.. they cannot because Heatran is a legendary. The GameFreak creators made it so you cant reproduce legendary pokemon. But, it would be fun to have an army of them:)
you cant
you cant. there are only regis in ruby, saphire, or emerald. you have to migrate it from one of those games
u cant
to get past the people in the battle frontier, you have to complete the sinnoh dex. then you will obtain the national pokedex from professer rowan in sandgem town
To get totadile on Pokemon Diamond you have to finish the Sinnoh pokedex and the National pokedex. When you finish both of those you have to go to professor Birch and he will say he has 3 Pokemon that he found with his son and cant take care of them on his own and wants you to take care of one. -Growlithe Girl
You need to get the national pokedex, which means that you need to see the 150 Pokemon in the Sinnoh pokedex.
yes
fill your pokedex if you cant get the last three (darkrai,arcues,and shaymin then email me at sentakahishi@yahoo.com and ill tell ya how)
you cant you can only finish the sinnoh dex then go catch lengdarys
u cant,u most migrate it from ruby,sapphire or emerald yes u can, after u finish the whole Sinnoh Pokedex and receive the National Pokedex and the Pokeradar, go to snowpoint city, go in the grass and use the radar ( rare, but i have about 3 in my box including Froslass and Glalie snorunts evolutions
ManaphyYou cant catch Manaphy, but you can see it in a notebook on the table behind Backlot. The notebook/table is in the trophy gardens.
if you havent got the second pokedex you cant get there,soz but you need to finish the first 1 hope i helped!!! ;) -Chloe
you cant
heatran can be captured after getting the national pokedex. he is in stark mountain in the last room. you cant get dialga in pearl only palkia. however you can get a dilaga through gts or trade