Resistance is futile! If 0 ohm
You know what would be the worst boss battle ever in a video game if they ever made it?Sudden spikes in difficulty always get me. I find a difficulty level that I enjoy playing through with and then I hit some awful boss and it all goes to hell. Dragon Age was a big offender for this sort of stuff, especially in the whatever-the-fuck underground region.
If Dr. Wily made a boss named, "Spiked-wall man".