>>52188978You find him in the kitchen after you have done the stupid tournament.
After that you can find him in the library where the entity probably responsible for all the """time machine""" stuff is introduced and he also takes that moment to point out "Isn't it kind of weird that the future/past Pokemon in Area Zero are only there because of the time machine, but the book claims to have recorded those future/past pokemon being in Area Zero before the time machine was even built?"
In the context of "past" pokemon you could argue that "maybe they used to be there but went extinct or something" but in the context of "future" pokemon the book genuinely doesn't make any sense so this dialog works better for Violet.