Re-ment will be releasing the New Pokemon Forest 2 collection this December 3rd. Similar to the first Pokemon Forest, it has eight pieces that connect all together to make a large tree statue, but at nighttime.
Each box contains a tree part and also some gum. At 650 yen they are a perfect little pick up along the way, as they will be available at convenience stores and Pokemon Centers around Japan.
Alternatively you can buy a complete box! This means you get all 8 variants and can set up your Pokemon tree straight away.