The following information comes from the official Pokemon website:
In Pokémon Sun and Pokémon Moon, you can draw forth a Pokémon’s power to its utmost limit with Hyper Training.
Pokémon grow stronger by raising their levels and increasing their base stats. However, their power is still affected by the individual strengths innate to each Pokémon. Now, with Hyper Training, Pokémon that have grown to Lv. 100 will be able to increase their individual strengths, which has never been possible before.
With Hyper Training, you can increase the strength of the Lv. 100 Pokémon you’ve been adventuring with!
According to the latest issue of Famitsu, Etrian Odyssey V: The End of the Long Myth is confirmed to be receiving DLC. On August 4th, the following DLC shall becoming available in Japan:
Two more bits of DLC have been slated for the future, but their release dates are currently unknown. They are simply known as "FM Sound Source Addition" (which will be ¥800) and "New Adventurer 6" (price to be announced).