>>55254849This. We've seen plenty of different universes in the different games, anime, and manga, there really isn't a "true" canon, honestly. When it comes to just Generation 1 alone, for example, there's:
>Red gets Charmander, Blue gets Squirtle, Leaf gets Bulbasaur>Red gets Bulbasaur, Blue gets Charmander, Green gets Squirtle>Red gets Pikachu, Blue gets Eevee>Ash gets Pikachu, Gary gets Squirtle (I Choose You also has a one-off character named Marina getting Bulbasaur, and Tierno getting Charmander) 