It's possible that we may have learned the name of the next Pokémon video game, thanks to a trademark that was filed in Japan.

Serebii.net has revealed that Creatures Inc, Game Freak, and Nintendo have registered a trademark for the term Ultra Shiny. This is almost certainly related to the Pokémon series, due to the companies involved and the fact that the last games in the series were called Pokémon Ultra Sun & Ultra Moon. 

We currently have no other information as to what this name could refer to, but the most obvious guess is that it belongs to a potential third version of the latest Pokémon games. The Nintendo 3DS' upcoming library is incredibly bare, especially now that we know that the English version of Dragon Quest IX is no longer in development for the system. It's possible that Nintendo is looking for more games within the Alola setting in order to pad out the schedule during the twilight years of the 3DS.

The name Ultra Shiny may also refer to other aspects of the Pokémon franchise. Ultra Shiny might be the name of an upcoming expansion of the Pokémon Trading Card Game or it may be the title of an upcoming series of the Pokémon anime.

Ultra Shiny may also be the name for a potential Pokémon game on mobile phones, as Game Freak/Nintendo have likely been spurred into developing one, following the success of Pokémon Go. 

It's also possible that this trademark will go unused, as has been the case in the past. Game Freak has trademarked names for potential Pokémon games that have never been used, such as Pokémon Grey, which everyone assumed would be the name of the third version of Pokémon Black & White. The name Delta Emerald was also trademarked, which was likely in preparation for a potential third game in the Hoenn remake series.

The names Pokémon Brown, Pokémon Crimson, Pokémon Moonstone, Pokémon Purple, Pokémon Scarlet, Pokémon Topaz, Pokémon Tourmaline, and Pokémon Vermilion have also been trademarked in the past and have gone unused.