u wait till the game changes to night. Not the game the DS's time setting.
you dont make poffins in soul sliver
There Isn't
in the radio tower
no
goldenrod
jhoto and kanto regien Pokemon
you have to get it from Pokemon platinum or diamond
Happiny, into Chansey.
you cant
in the kanto region
in the cities
you dont use it it only unlocks a cave