yes, either migrate it from a gba game, or use the ar calculator code
You have to use Pal Park.
No.
Mew can't lay an egg.
I did hear that you can get one by doing something on my Pokemon ranch for the wii.
you need a action replay that is the only way
Hack or trade.
It's Manaphy. In the Noational Pokedex it is Mew
You can't find Registeel in Pokemon Platnium. You just migrate it in Pokemon Ruby, Pokemon Sapphire, and Pokemon Emerald.
There is no 'platnium', but you can find it on wild pokemon.
you cant catch it in platnium but you can trade it
i only know that it for events only another way to get it is to use a cheating device pokemon heartgold and soul silver diamond pearl and platnium i think
the most wanted in this houshold is Pokemon platnium