We will release Pocket Monster 64 as a 64DD launch title. The title will be different from the Pocket Monster RPG we are also developing.
We will use the characters from Pocket Monster in several 64DD titles. Currently, we are developing common data which allows us to use characters for different titles easily. The Monsters are already 3D modeled and development is 50% done. Maybe we can show you screenshots sometime this summer. Of course, Pocket Monster RPG is also under development. Satoshi Tajiri (creator of Pocket Monster) is taking charge of it.
[NOTE: If you're slightly confused by this, it now appears that there are two Pocket Monster games in development for the 64DD. Pocket Monster 64, which will be available at the 64DD's launch, is not an RPG. There is, however, a Pocket Monster RPG, based more closely on the Game Boy versions, in development for the add-on.]