>>88656594Any character?
Well let's look at this, Amazo /was/ a conglomeration of nanites before he got all ascended and such. Really one could only hope to permanently beat him by destroying him all at once without a trace left behind, ideally with some level of surprise.
Ok I thought of someone who can destroy him instantly, with no remains, and with a decent chance of even being able to catch him off guard. If only because he probably wouldn't be able to tell if something's been set up by him, without prior knowledge of what to look for.