It isn't impossible, but the video games you're talking about are games from Konami, the creators of the card game. They have dozens of developers sitting there and thinking about an AI and get paid quite alot for doing so. The MUD got two main devs who do have their own jobs and are doing some things in their free time to the MUD, there is deffinitely no room to invent a YGO AI from scratch. There are other bots out there who tried something similar, like windbot, but those cannot be connected easily to the MUD, plus they only know how to play with specific decks. The Konami AI is one of the most intelligent card game AIs I've ever seen to date, you can throw any deck at it and the most recent AI can do moves with it most human YGO players wouldn't be able to do. Developing something like this would require multiple close-to-full-time-developers who are specifically skilled with AI development, and neither the YGO open source community, nor the MUD have such capable people sitting around and doing that for free right now. And you cannot pay people if you don't have the money to do so .
Best Regards.
Hijacker