This episode kinda makes me think of what parents and kids go throw when the kids get older and start going through puberty,
Guy was a nice character of the day character that got development throughout the episode. Nifty that both Treecko and Loudred both evolved into Grovyle and Exploud, respectively. Pokémon change all the time, not just upon evolution. Exploud was probably surprised that it changed and went out of control.
Daizy said:Guy looked like Harley's sibling and to just have an older trainer like him who dances and gets all weepy-eyed and hesitant with the concerns of his Pokemon was cool.