The Secret Reason Ash Abandons His Pokémon is Brock & Misty

Fans often question why Ash leaves his strongest Pokémon behind when entering a new region, but the show offered an answer for that the first time.

charizard – Pokémaniacal

Pokémon: Why Was Misty Replaced But Not Brock?

Pokémon: Indigo League - Wikipedia

Misty – Pokémaniacal

What if Serena meet Ash in his first Pokemon journey except Misty? Does she like Ash in Kanto as she likes him in Kalos? - Quora

Ash Ketchum - Bulbapedia, the community-driven Pokémon encyclopedia

How did Ash catch his Snorlax in the anime 'Pokémon'? - Quora

Ash Ketchum - Bulbapedia, the community-driven Pokémon encyclopedia

Pokemon: Misty And Brock Return in New Preview