Does the AI make different decisions when it knows held items?

Question

I'm mostly asking about Frisk, but the answer probably applies to other item-revealing methods as well.

If a computer opponent had a Pokemon with Frisk and saw your Pokemon's item, would it impact the move it chooses? Some examples:

• Type-reducing berries (e.g. would a Chikorita with Tanga Berry still prompt Yanma to use Bug Buzz, or would it choose the now-stronger Air Slash?)
• Weakness Policy (would the computer stay away from using super effective moves?)
• Item-swapping moves (e.g. would a computer refuse to use Trick if it would give itself a harmful item like Black Sludge or Sticky Barb?)
• Conversely, would the computer prioritise Trick if it saw a helpful item like a Sitrus Berry?

I'd like an answer for the postgame battle facilities, but any other instances are welcome.

Thanks in advance.

Comments

This is still going to be unanswered in 2028, isn't it?

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It's a medal of honour if sumwun of all people says your question is hard to answer.

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You've taken more than your fair share of questions from the unanswered list. It's about time you gave back.

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This could probably be testable with Lance in HGSS, who has one of the smartest computer AI in the main series. After Skill Swapping (and maybe Hypnosis) with Stantler, open with a Dragon type with a Dragon-reducing berry to fish for Gyarados's Dragon Pulse, or a Weakness Policy for Ice Fang. This wouldn't satiate the final two points but it would nail the top two

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Damn, this is the first question I'm genuinely not sure about. I know in many ROM Hacks this would be the case, but I'm not sure if it also works like this in vanilla. Also, it obviously depends on the game and the trainer, as each one has a different level of AI. I'll give an answer based on what I've seen, but don't take my word for it, I'm not sure how it works in each specific game.

1) Type reducing berries is what I'm not completely sure about in vanilla, as I've seen and used this strategy many times before, specifically in Pokemon Vintage White, whose AI I am pretty confident is unchanged from vanilla. Though this was against the Elite Four, so they would have the highest/almost highest level of AI.
I also think this might be gen 5 specific, though again, I'm not sure
2) Here I can pretty confidently say no. No Pokemon AI is smart enough to do that.
3) Again, almost sure that's not the case for the same reason as before
4) Same thing

I also don't know how the AI levels work numerically, so I won't try to convert it to the post game facilities as you wanted, though it's not that hard. Every trainer has an AI level built in which can be accessed by certain ROM hacking tools.
This is unfortunately as close as I can get to giving you a "correct" answer, I'm sure there's an AI pro out there who can correct me.