Super Smash Bros. official blog Ultimate in Japanese have recently updated to include the official description of Mr Game and Watch, one of the interesting characters that will be available on the next 7th December when the title is premiere on Nintendo Switch. These details were shared yesterday, but nevertheless, it never came to be offered in the western blog, which is currently talking about this character.
It's very strange, because every blog is in all languages they are usually co-ordinated. However, it seems that this character does not have its own blog post to the West. It is not known why this is and we will be vigilant if it offers more information.
You can check the Japanese record on this link and the Japanese character trailer below: