no
you have to trade them from a game that has the national dex.
You must have the National PokeDex to capture Heatran.
eterna forest 10%
you have to get 150 different types of Pokemon
You have to have the national pokedex, because you cant find a lot more Pokemon without it. :)
It depends on the Pokemon you're trying to evolve. While some Pokemon can evolve without any problems due to being in the regional Pokedex, other Pokemon (Golbat, for instance) won't evolve without the National Pokedex. Note that this is only the case in FireRed and LeafGreen - in later games, Pokemon not in the regional Pokedex will evolve, but won't be recorded until you get the National Pokedex.
you have to trade them from a game that has the national dex.
You must have the National PokeDex to capture Heatran.
you need a cheat for it.
you cant
you can't
eterna forest 10%
You can catch them on Iron Island once you have the National Pokedex. You get this by seeing all the Pokemon on the Sinnoh Pokedex.
you have to get 150 different types of Pokemon
the number says ???
it is not possible to get them without evolving or trading.
Without seeing cresselia, you must go to bed during the night (approxiamately 10pm) and he will appear in a dream. that is how you get him on your pokedex.