Win or loss, Serena was so proud. And... slightly jealous. Satoshi was always unaware of girls. Being a unique trainer had its benefits. With a rare Pokémon that can undergo a strange transformation that only occurs once in thousands of years, he's bound to have some attention. Although he lost the Kalos League, he was a famous as the champ. However, he was either "just a kid", like Iris said, or was saving himself for someone else. Eureka's just being a little hyperactive, she won't cause any trouble, will she?