I'm not a huge Pokemon fan, barely recalled the anime series and had only known the first gen...but I don't mind playing the game again casually.

I guess watching the unboxing videos of Pokemon cards got me intrigued.

-(not entirely sure how Sethan's de-aging maintains it until he was 2-3yo).

Anyway, any hair colour on PolPol is valid. I think most fans would go for blonde aside from his white-silver do.