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VGC is a fanfic meta.
>VGC rules are developed and published by TPC
>About the Pokémon Company International
>The Pokémon Company International, a subsidiary of The Pokémon Company in Japan, manages the property outside of Asia and is responsible for brand management, licensing, marketing, the Pokémon Trading Card Game, the animated TV series, home entertainment, and the official Pokémon website. Pokémon was launched in Japan in 1996 and today is one of the most popular children's entertainment properties in the world.
i.e., the people who write the "official" metagame rules aren't the video game devs. You could say they're pretty prominent fans of the series. Needless to say, I'll stick with the more community-based and responsive singles fanfic, as opposed to the doubles meme fanfic that's managed from the top-down. I mean, imagine playing with Dynamax! What a joke.