A Japanese trailer gives an overview of what Pokémon Brilliant Diamond and Shining Pearl have to offer.
For example, the images show more of the Sinnoh region and how pokémon can walk after players. Also featured is the revamped Pokémon Contest, which includes a rhythm game, and the Grand Underground. The latter location offers the option to build a Secret Base and capture Pokemon that are not available on the surface.
Brilliant Diamond and Shining Pearl are remakes of the 2006 Pokémon Diamond and Pearl for the Nintendo DS. The games are coming to Nintendo Switch on November 19.

