Doraemon: Nobita to Midori no Kyojinden DS is an Action game, developed by Inti Creates and published by Sega, which was released in Japan in 2008.
One day Nobita found a small sapling behind the hill but his mom won't allow him to plant it in the backyard. Using Doraemon's special tool, they made the tree alive so it could move around freely. Nobita name it Ki-bou and the two became like brothers. From there, a new adventure awaits.