Versions: Nintendo Switch
In the Nintendo Switch version, alongside the Pokédex is a special feature known as Research Tasks. These Tasks are set by Grand Oak in order to help you fill out your Pokédex. These tasks need to be completed by putting the species of Pokémon into HOME's Boxes. However, to complete them you need to put in Pokémon from those games. For example, a Rotom from Ultra Sun will not activate the Rotom in the Pokémon Sword & Shield Research Tasks.
Hisui Research Tasks Research Tasks
Game: Pokémon Legends: Arceus
Sinnoh Research Tasks Research Tasks
Galar Research Tasks Research Tasks
Game: Pokémon Sword & Shield