Why did Ash need to go back to Pokemon School?


I was watching Pokemon Sun Moon. In the answer to this question _["Why did Ash
became a child back in Sun Moon
Series?"](https://anime.stackexchange.com/questions/38645/why-did-ash-became-
a-child-back-in-sun-moon-series)_ it says that Ash never age so obviously he
didn't became child.

But why did he need to go to Poke-school? He knows a lot on Pokemon and he
went on till the finals in last league (Kalos)




As I said in the comments, Pokemon is a series which has been on air for a
long time. But it's still mostly aimed for kids.

Whereas kids watching the first ones are now adults, it would be strange to
have a Ash kid, pro at Pokemons and already knowing everything.

So at each beginning of a new series, they explain everything again for the
new kids watching and because it's important to see a progress. If Ash knew
already everything, had all the Pokemons from various regions, then it would
become boring to follow him on his journey as he will certainly be a lot
stronger than most of his opponents.

By doing as if Ash knew nothing at the beginning of each series, you can then
follow again is evolution and grow up with him.

(Sorry for bad English as I'm French, and hope that you still understand)




As I said in the comments, Pokemon is a series which has been on air for a
long time. But it's still mostly aimed for kids.

Whereas kids watching the first ones are now adults, it would be strange to
have a Ash kid, pro at Pokemons and already knowing everything.

So at each beginning of a new series, they explain everything again for the
new kids watching and because it's important to see a progress. If Ash knew
already everything, had all the Pokemons from various regions, then it would
become boring to follow him on his journey as he will certainly be a lot
stronger than most of his opponents.

By doing as if Ash knew nothing at the beginning of each series, you can then
follow again is evolution and grow up with him.

(Sorry for bad English as I'm French, and hope that you still understand)

