Well, in the games it's always someone with a starter who is super-effective against yours...so there's a challenge to surmount! Your starter is a Dark and Steel type, so you'd need someone who has...let's see. Fighting, Bug, or Ground...Fighting's good against both Dark and Steel, so your destined rival is someone with that sort of starter, for sure.

[ GUESS WHO HAS A FIGHTING TYPE STARTER, BTW. HE MAY OR MAY NOT HAVE ALREADY PISSED YOU OFF. ]

Mine's Kirigiri-senpai. She's already got badges, so I have to work really hard!