Is it a tree house?
Yes it is possible to build a pond on top of an house but doing this you must involve a Civil Engineer the walls may have to be thicken and foundations may get bigger. Just an architectural hint a glass(actually i think its perspex) pool is nice :)
good triumphs over evil
Pond-Weed House was created in 1700.
Borden-Pond House was created in 1856.
good triumphs over evil
You need a player owned house, then simply build up your construction level high enough to build garden and stuff to place in it, then create a new room, select garden and start building, simple.
Gideon H. Pond House was created in 1856.
Go to Fuchsia city. There is a house with a small pond in it's garden - in that house, there is a Fishing Guru. Say yes to his answer and he will give you the Good rod.
build a pond n let them reproduce in it
You can get one in Fuchsia City at the house beside the wardens house. behind the house you can catch a Poliwag in the pond. Hope this helps. :)
In the pond.