I made an updated, final spreadsheet with all the overall win rates of Ash's Pokémon, only on the Official Battles they had, that were shown on the anime. Those include: the Gym Battles, the Pokémon League Battles, the Battle Frontier Battles, the Island Trials and Kahuna Grand Trials (plus the Kukui Exhibition Match after Ash winning the Alola League, which is pretty much like a post-League Champion Match, for Ash to assert himself as the strongest Alola Trainer, defeating Kukui/Masked Royal), and the World Coronation Series matches that Ash took part in on his way to classify for the Masters Eight (along with the Masters Eight Battles themselves, which coronated Ash as the Monarch, the strongest trainer in the world, after beating Leon and taking his crown). Anyway, cheers to our "Forever 10" Pokémon Master!
by GeleiaDeTomate