Originally Posted by BlackMagicWolf
Actually they've stated that Ash has actually grown in the series age-wise. If you listen carefully in the Pokémon 3 movie during the Pikachu short you'll hear Ash mention that it had been one year since they met. So technically he has grown up over time, they just don't mention it a lot.
Oh and I'm fine with Ash being the protagonist....again.
well they've rectonned it since then because in the newer series, they said that he's still 10 years old.