Okay, you were a novice trainer who, lacking the typical starter Pokémon, received a Zygarde Cell from an assistant to the Pokémon Professor in your home region (you choose which one). This Zygarde became your starter Pokémon. That day, your adventure began.

Now, after becoming the second Champion of your home region, you're traveling through a region of your choosing. Four of your Pokémon, who decided to join you for no apparent reason, have settled into an apartment and decided to relax for a while before getting back into action.

In any case, your other three Pokémon are in their respective rooms; yes, the apartment is large. So I'll leave you free to do whatever you want.