The Pokemon found in the White Forest depend on the people you have in your version of White Forest (through talking to them and Extralink).
The list of avaliable Pokemon are:
Lotad, Trapinch, Corphish, Happiny, Aron, Surskit, Magnemite, Starly, Wooper, Nidoran M, Hoppip, Slakoth, Oddish, Nidoran F, Machop, Pidgey, Magby, Gastly, Budew, Rhyhorn, Shinx, Mareep, Porygon, Wumple, Abra, Azurill, Elekid, Togepi, Seedot, Ralts, Whismur and Bellsprout.
Trade it from White. It is found in White Forest
Trade from white, can be found in white forest
Venipede can be found in Pinwheel Forest and in Lostlorn Forest.
The SolarBeam TM can be found in Pinwheel Forest in Pokémon White.
White forest is only in pokemon white.
Nowhere. you can find the Black city in pokemon black and White forest in pokemon white. YOu can't got to the white forest in pokemon black
It can only be found in White Forest which is only available in Pokemon White. But you transfer it to Pokemon Black or trade for one.
TM22 Solarbeam can be found in pinwheel forest
ilex forest isn't in pokemon white
Found in the White Forest when Grace is a resident of the forest. You must use the Entralink to connect with Pokemon Black and visit that version's Black City to find this resident if this resident is not initially available. Pokemon White only.
Togepi can be found in white forest (Pokemon White exclusive) but there is no way to catch a togetic in the wild.
Same place as white forest in Pokemon black... nowhere. Pokemon black has black city, Pokemon white has white forest.