I put in my buneary into the dream world and as soon as I logged on it said most of my berries have gone to the world tree. I had over a thousand berries saved up and after that message I received 7000 points and I was only left with one of each of my current berries in my chest. I had no idea if it's a random event, a restart for the new Black and White 2 server, or if it was because my buneary had the klutz ability. If it's a controlled event I'd love to be able to use it in the future to boost my points.