I like the way that sounds. It would make Brian become the strongest one here, because he has yet to win a battle against another trainer. :D
And I guess Drizzle, Nova, Ellie, Rama, Pala, and Volca would gain the most experience, because they were in the whole thing the whole time. Duster and Snype came later, but they were fighting a lot, so they wouldn't get as much would they? Frost and Bouncy only fought a little, so they would only get a little bit. And Thyme would get nothing as she wasn't even there. And Brian hadn't caught Leena, so she naturally would get nothing. That seems to be how the breakdown of experience would be based on what you said.