[Assuming he's referring to the Pokemon match-making thing Cilan was talking about--]

Well, with some Pokemon, they prefer their partner to be a Pokemon that's capable of holding its own in battle, so they'll sometimes battle one another or other prospective mates to impress their desired partner. At the time, my friends and I helped train a Cottonee we met with improving its aim and dodging skills so that it could impress another Cottonee that it was smitten with.

[...Unless there was something else you meant by that, in which case, hey, enjoy the free lesson about Pokemon match-making.]