For example, the Pikachu [English] is referring to the CoroCoro glossy release (i.e., an English-language card printed on Japanese glossy stock)
Heres all you need to know
Discounting the legal aspects of the entire situation, this argument rings hollow, mostly because it's not just expensive cards that are being counterfeited
Of course, the Commander Rules Committee (which is separate from WotC and Hasbro) can always just ban the cards from the EDH format that WotC says the cards are ultimately being printed for, thus arguably reducing the cards' overall appeal
I know these dont strictly fall into the complex board state definitions, but paying attention to the small details, especially with phases, is a massive part of MTGA that you may need to take very seriously when you compete at high stakes tournaments or when you have invested gems in the valuable events like Arena Direct and Arena Open