→ ring a bell
I don't remember who I have the hardest time with on Ruby. My bets would have to go with Norman because back then my teams never had a Fighting type nor a Fighting move. But on my Emerald I would have to say Juan because Kingdra and being quite under leveled. Also Girafarig being the one with a Thunderbolt move ye-up. Not sure if I had my vileplume by then either.