It was metioned a few times thru out anime but not in great detail. Most nnotably school of hard knocks which metions levels. Also imitations confrontation in Johto arc where Duplica mentions how counter is fod physical attacks and mirrior coat is for special attacks.
Pokémon ships I am most into.
Firm ships poke,handyman,and contest.
Loose ships, Paul x Dawn x Zoey,Paul x Dawn, Dawn x Zoey, and Clemont x Serena
Platonically flirt ships Delia x Oak and Delia x Brock.
Favorite friendship ship
Misty x May