No you can't alter a town. Its just to alter your character and your pokemon.
You can't get palkia in Pokemon platinum. You have to trade it from Pokemon pearl. But it's registered in your pokedex when you go to the library in celestic town and read the book. You can also use pokesav.
No, they removed Lavender Town in Pokemon Diamond, Pearl, and Platinum.
you go to solance town
Oreburgh Town
There is no town called Twinleaf Town in Pokemon Leaf Green, only in Pokemon Diamond and in Pokemon Pearl.
you can't
There are Pokemon Centers in every town/city.
Sandgem town is the second town in Pokemon Diamond/ Pearl/ Platinum. It is the home of Professor Rowan
There is no dewford town in pearl. Only in Ruby Sapphire and emerald. correct me If I am wrong
solaceon town has a daycare in Pokemon diamond and pearl
Solaceon Town is in Diamond, Pearl and Platinum, not Pokemon White.
it is in solaceon town