The Stadium games are nonstop cheating. Just watch some of Werster's runs, there are clear instances of the computers using certain attacks, switching, etc. in situations where the only reason they would want to do that is if they know what the player is going to do on their turn. The computer teams are also given a lot of paralysis, sleeping, confusion moves, accuracy moves etc. because the RNG is skewed towards them and for instance confusing you gives them more opportunities to stop you from winning.
The mainline Gen 1 games literally have the AI pick their action AFTER you pick your action.