𝐏𝐋𝐄𝐀𝐒𝐄 𝐇𝐄𝐋𝐏, how can I make an entity have artificial intelligence

mcreator cannot do that, you could make a markov chain to make semi-intellegent speech.

If you just want the entity to have intelligent dialogue, it wouldn't be that difficult, and I can help you with that. But if you want it to actually result in movement, attacking, etc. that would be a real challenge in both programming, prompt engineering, and parsing the response.