2 Player Input System for a Fighting Game?

Hey Guys,
i have come across the common problem of not being able to control two characters at once. I tried a method that worked some versions ago, but is outdated by now. So if anyone could give me an idea on how to solve my problem that would be awesome!

Best regards
Andy

I can’t find any definitions of SSP :confused:

Here i my project, if you please could take a look at it and say what I have to add where and so on.

It should be a 2 Player Game either managed by 1 keyboard or 1 keyboard and 1 controller … depends on what is easier :smiley:
At this moment of time the game is a local one and should therefore not use multiplayer features.