The TARDIS as a Transformer...

[KJS]

We know the TARDIS already has a level of sentience in the Whoniverse, but what if we were to give it an actual life of its own by activating it with the All Spark from the Transformers movies?

Let's call it... "Optimus Time" [insert the facepalm emoji and the rolling eyes emoji].

How powerful is Optimus Time? What's the weakest robot in fiction that could defeat it? What about the weakest sorcerer?

That's it. Those are the questions.

[Shai-Hulud]

What's the weakest robot in fiction that could defeat it?

Amazo, the Fury, the Superman Robot... a few possibilities, none of which are really very weak.

I can't imagine Borg nanoprobes compromising a TARDIS, but if they get inside, they do adapt. Could they adapt to the Temporal Grace defense? Probably not, but there may be way more powerful nannites in fiction I'm overlooking.

[Shai-Hulud]

We know the TARDIS already has a level of sentience in the Whoniverse, but what if we were to give it an actual life of its own by activating it with the All Spark from the Transformers movies?

What about the weakest sorcerer?

Mordru, the LSH foe comes to mind.

If we're really brainstorming for weakest, how about Voldemort?

The way that scenario goes is the Killing Curse would snuff out that portion of the All Spark that animates 'Optimus Time.'

The TARDIS would in no way be destroyed, but it would be 'un-Transformerized' and Voldy could claim a win.