My true form
In fairness on the 10 year old thing that's really only been established in the anime as a hard rule. I don't recall the games ever stating it. Plus the pokemon world's safety laws are dubious at best (If i remember correctly the Mistralton Gym literally fires you out of multiple cannons)
As for the elite 4 I found it more odd that they re-used Larry in the elite 4. I thought they'd have used Raifort as the elite 4 flying member given she's literally got a bird logo on her
Did you miss the Marshadow hair accessories? She wears a variety of stuff.