Here is an arcade fight stick (or plug-and-play console) for CAPCOM. When a KO happens in a game like Street Fighter II, the board illuminates much like the background does in the game.
I was inspired by the brake lights on car, so I put a KO pattern on the board. It could have additional graphics and colors, but I went with my preferred less-is-more approach.
This would need to be a first-party release from Capcom or Neo Geo, because they would need to program the stick to respond to KO’s in the game.