Companion Comic
I'm gonna copy and paste what I wrote on Tumblr:
I'm sure someone has made a design for Metal in SATBK before during the last 10+ years since its release. I just haven't been actively looking for them. So I saw the potential in making one myself, as well as making a short comic to go along side it (which I took way too long to draw).

I would imagine this will take place as a post main-game stuff, where which Sonic will have to take up the mantle of being king for a while before going home.

So there's an actual sword made from a scythe called a scythe sword, and given that Metal was drawn as the Grimm Reaper at some point I say it was an easy pass when designing one for him.

It would make sense and true to the game's themeing to have him stay dead after the battle, but making him Sonic's successor sounds like a good redemption arc in contrast to regular Metal.

Yeah I did not decide what to name Metal's counterpart, given that I am horrible with names, and I'm not too caught up with Arthurian legend either. But Black Knight itself is following the surface level of it and doing their own thing so I shouldn't care too much on being too accurate with it.

Actually, I've been day dreaming Black Knight being remade into an RPG and I think it would work well as one. Shoving in Galahad and Lamorak into a new game plus story is a great way to have them in it without needing to place them in mini-games.