if by name changer, you mean the Pearson that will let you change you pokemons nickname, is on the first floor of one building in eterna city. but he will only let you change a name if he doesn't like its current name.
Well that's stupid what if your Pokemon Lugia is nicknamed Lugiaa and he hates it? what if its name is víúqëêÇ and he likes it and you want to change it? then there is no point or a Japanese name? What about that?
The name changer guy is in eterna city next to the pokemart
Pokemon titanium
you can't clone Pokemon on DP.
No Sorry
In Jubilife City
Lavender Town.
route 224
lavendar town.
Because people were complaining about how there were no religion in the Pokemon world
there all many new Pokemon go on http://www.serebii.net/diamondpearl/Pokemon.shtml this web tells what Pokemon there are there all many new Pokemon go on http://www.serebii.net/diamondpearl/Pokemon.shtml this web tells what Pokemon there are
the name rater is in goldenrod city to the left of the third gym (Whitney)
berry masters house