When battling mother fuckers over wifi, is it just me and my home boy Ash that whip out our Pokédex (in my case my phone with a Pokédex app) to check their mons when our info of them is lacking?

Is this how all of the very best Pokémon trainers do it?
If you don't do it:
How come?
Are you a scrub?
Have you memorised every Pokémon?