Mecha Luigi is both the most awesome and most close (by a lot really) so far. I swear I thought people would guess this right away because I mentioned it before, but I guess it was a week or so ago. :P
I'm trying to be somewhat liberal with hints, because probably less than 0.01% of the population has this on their desk. :P
Sorry to bring in the news, but this one just got updated again not too long ago. I'm not terribly interested in the game, so feel free to take your time to update it. 敗戦隷姫エルネア to v25.04.23