>>37504404And you're not required to watch every single iteration of the Pokemon Anime in order to understand the story or characters, especially since they've keep references to past iterations to a minimum aside from the Indigo League ever since BW, and even with the Indigo League stuff they usually supplement new Japanese viewers by means of flashbacks or airings of Indigo League Episodes on the Sunday Morning Variety Show.
All you need to know is that Ash Ketchum is a Pokemon Trainer from Pallet Town, his main Pokemon and best friend is Pikachu, and the two of them are currently in [Region] for whatever reason and will eventually take on the Pokemon League, meeting new friends both human and Pokemon along the way while avoiding and deflecting the Team Rocket Trio's antics.