I asked the AI to make an Elemental HERO Neos deck list, but it kept trying to add extra deck monsters (like Aqua Neos or Brave Neos) into the main deck, or add extra deck monsters that the deck wouldn't be able to summon. I'm surprised at all of the competent decks it's building for other people.
its kind of funny because chatGBT has been shown to perform some miraculous things but the fact it can't build a good or reasonable decklist surprises me. im told that if you dont get what you want you can usually ask it or probe it in a different way to do so but the fact it didn't with yugioh is crazy to me.