Do you have the corresponding trainer in your White Forest? What pokemon you can catch in the forest depends on what trainers you have currently living in it. You can invite different trainers by using the entralink to enter some else's Black City (Black Versions only, obviously), but if you don't have access to a copy of Black, you can't change the contents of your forest.
also i dont have anyone to entralink with but, my forist is changing a bit, theres 5 pools of water w/ sunskirt in it, cant fish, only surf and get that pokemon, and i only got 1-2 small patches of grass, and the trees are seeming to taking over, ive talked to the people in the forest almost every day, and its supposed to keep ur forest in line isnt it?
Remember, you cannot get all the pokemon in White Forrest. At the beginning of the game, pokemon in White forrest is preselected for you and you cannot change that, UNLESS you entralink with someone with black version.
When you local wireless with someone with Black Version, you have a chance of getting the person who might say "I saw a Togepi". Best explained on Serebii.net
MWR code: 173-369-685-125 (my cause) CoD: Black Ops (Wii) name - (THE WARCOW)