In response to the above rant:
1. If it was metronome, it would not be limited to her other pokemon's attacks.
2. Even if he has them (which I haven't yet seen in the TV show), he could just sell them off to the highest bidder...or keep them. There's nothing wrong with having more than one of any given Pokemon, especially if it's a powerful one.
Anyway, yes, those two people (Oscar, the man, and Andy the woman (Andy is usually a MAN'S name, btw...)) WERE way over the top...but I guess they served their purpose...I still think it was a scam or something--trick couples into battling then break up their relationship...
...It would have been much more enjoyable if, for whatever reason, Misty had shown up at the very end and made the episode a multi-parter......