So let me get this straight, to capture a Mareanie, you have to get into a battle with a Corsola and then beat the stuffing out of it until it cries out to its friends to come save it. But no, you just tricked it into attracting a Mareanie, which eats Corsolas.
Yeah, that's a thing. Mareanies eat Corsolas. Just chomp their little sticks down to nubs, then dine on them soft-shell style. And to make this all worse? They are the same egg group.
What the fuck, Game Freak?