>>29462602In the japanese trailer we actually see the attack dealing damage to an aerodactyl and we see its HP going down.
https://www.youtube.com/watch?v=UuiDXEK3lL4I made some calcs assuming Primarina SpA attack is 105, it has neutral nature and no EVs in all. To K.O aerodactyl the attacks has to have in least 80 base power.
I honestly would had like seeing Primarina hit something with better defenses to do a better speculation.