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Kunihiko Yuyama (executive director/creative supervisor of the anime) interview just dropped. Here's what he said:
> One of the themes of MPM is Satoshi figuring out what exactly being a "Pokémon Master" means to him, personally
>They wanted to change up the EDs more than they ended up doing
>He teases that "that Pokémon everyone wants to see" will show up at the series' climax
>He describes Satoshi as "forever ten years old" and brings up his age more than a few times (RIP theories of Liko being his daughter, not even a new protagonist can make Ash age)
>He says he thinks we'll see Ash again somewhere in the future