It is in route 212.
you can find a wild kirlia in the Pokemon mansion area but not in the Pokemon mansion
in Pokemon mansion in route 212
In Pokemon Platinum, Pichu can be found in the garden behind the Pokemon Mansion. The Pokemon Mansion is located on Route 212, south of Hearthome City.
You find it in the Pokemon mansion. I'm not to sure but that is the place to find Happiny in diamond and pearl.
on platinum, you see Manaphy in Mr.backlots Pokemon mansion
its 1 of the daily Pokemon in the Pokemon mansion
You talk to mr. backlot in the Pokemon mansion south of Hearthome city!
in the mansion that has gastly
info on manaphy in Pokemon mansion. trade for manaphy, and breed with ditto. you get a phione
The Pokemon is Azurill, and you find it in the Trophy Garden which is behind the huge mansion under Hearthome City.
You can find it at random days in Pokemon Mansion in route ---, talk to Butler (or whatsoever) and he will say random Pokemon is in the garden, if is ditto, go get it!
go to the Pokemon mansion and then trade for manaphy