Did they explain Ash`s new look (Pokemon anime)?

[Frogger]

Oh, and for the OP, there is no need for explanation. It's a new art style. Everyone looks different.

And there's a technical reason for the change in art style, which is that it aids in animation because its model simplicity allows animators to go off model for more creative and flexible animation techniques. The first two episodes of Sun and Moon are more beautifully and intricately animated than every prior episode of the anime combined.

You thought the battles in XYZ were impressive? (they weren't) Wait until you see the battles in Sun and Moon. The animators are doing the types of things you usually only see in anime like One Punch Man or Mob Psycho 100. This is serious shit Pokemon is doing here.

And if you're comparing it to something like Yokai Watch, please don't, because you genuinely have no idea what you're talking about. Which is fine. Life is a learning experience. This is one of its lessons. This was not done to make it look like a "cheap western cartoon." This was not done to make it "appeal to the Yoke Watch crowd." This was done to boost the animation quality substantially, and is indicative of a higher animation budget, not a lower one. It was also done to make Ash look his age, because he has never looked his age.

tl;dr - It's meant to look good in motion, not in stills, dummies.