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>already won a league
>already caught a legendary
>owns the strongest Pokemon
>is the strongest trainer
>already beat the battle frontier
>mastered every gimmick
>already had his first kiss
>beat a contest just to do it
>has seen every pokemon in every region except paldea
>traded Pokemon multiple times
>caught a shiny
>tamed a disobedient pokemon without having enough badges
>fought a pokemon with his bare fucking hands
>invented multiple of his own pokemon moves
>hes the reason a new species of Pokemon, Melmetal even exists
>caught an ultra beast
>defeated several evil organizations saving thousands of Pokemon
>his Greninja is the only reason Kalos is safe from giant fucking tentacles to this day
>stopped Cynthia from retiring
>taught a Snorlax 6 moves because he's ash fuck you
>matured beyond his season 1 self and became an actual level headed character that doesn't let every major victory go to his head.
If all all this shit doesn't make ash a pokemon master then I don't know what the fuck will.