you get a thing for ur poke watch and it will tell you how much ur pokemon's friendship is full.
More than all the Pokemon info you'll want to know is at Seribii.net, my favorite website.
there are none that i know of in diamond. sorry(-_-)
as far as I know you can't get entea in pokemon diamond unless you trade.
There isn't a flute maker in Pokemon diamond as far as I know.
It depends... What Pokemon is it? (Not that I know...)
well i do not know
The Legendary Pokemon in Diamond are Dialga, Azelf, Mesprit, and Uxie. That's all I know of.
You cant get a piplup mask on Pokemon Diamond or Pearl u can get it but i don't know how
Will you tell me what is that pokemon?I don't know what is the 47th pokemon....
To get a Venusaur on Pokemon Diamond you have to get the National Pokedex and look for its area, if it's unknown then I don't know what to do.
i don't know, but giratina is a legendary Pokemon if you mean him
As far as I know, its not possible, sorry.