To acquire the Shiny Charm, you must complete the Pokédex of all 242 current Pokemon in the game. To complete a page, simply get a level 10 research. Darkrai and Shaymin aren't required to complete the Pokedex as they are from Requests.
If you pay attention to some locations on the maps of different locations, some names for future cities and towns can be seen such as Veilstone, Snowpoint, Oreburgh. Solaceon Ruins are also present before the cave became more developed.
Within two weeks of release, this game became the second highest selling game for the Nintendo Switch console, toppling Animal Crossing: New Horizons to third place. The only game to topple this is Mario Kart 8 Deluxe.
Lake Acuity, Lake Valor and Lake Verity all make an appearance in this game. The game shows how they became to be caves holding its three resident Pokémon.
The 5 Nobles Of Hisui are Kleavor, Lilligant, Arcanine, Electrode and Avalugg. The 5 Wardens of these Pokémon are Lian, Palina, Melli, Gaeric and Arezu.