Best instance of a side character being a main villain

[Dark Soul # 7]

Wait - I’m a little confused. The title says a side character being the main villain, but then the OP says when a non-main character bests the antagonist (in which case the non-main character is heroic, or accidentally so).

Did you mean bests the protagonist?

In which case, do we count Verbal Kint / Kaiser Sose? I mean he’s a prominent character, but always presented as otherwise.

I see the problem.

I think the title is supposed to say " Best instance of a side character beating a main villain"

At least based on the video in the OP.

[Kuro]

I see the problem.

I think the title is supposed to say " Best instance of a side character beating a main villain"

At least based on the video in the OP.

Oops, you're right.

Was in a rush and totally typo'd.

Mods, can someone please fix?


Also

[Jackalope89]

Oops, you're right.

Was in a rush and totally typo'd.

Mods, can someone please fix?


Also

Could be interesting, fun, or downright terrifying. For instance, a world like Konosuba would be awesome. A world like Dragon Ball, as much as I love the series, would be terrifying. Demon King Piccolo, Cell, Majin Buu, Freeza coming alive, Future Trunks' timeline in general...

Yeah. Living nightmare.

[K7P5V]

A personal favorite would be Nebula beating Thanos from...

Infinity Gauntlet #5