Damn, "Stamp on the Ground" is still online.
https://www.newgrounds.com/portal/view/510929
I remember watching this when it first came out and absolutely squealing with joy when I saw a bunch of characters from an online comic I was reading at the time.
The youtube version (youtu.be/XTtDn78THNU) has a visual cast list at the end — the text cast on newgrounds doesn't help me as I know hardly any of the characters. (Presumably the flash version had that too, but that requires flash.) (Even with that I still can't find who the one in blue on the left at 2:00 is though!)
@renbymon Aah, could be. I think when I searched I may have found the Raiden from Mortal Kombat instead!
(I am so unfamiliar with that whole generation of games - before university I was an Atari-only zone, then I basically stopped playing commercial games completely when I was at university in the 90s and only gradually started again in the last ~15 years, I think about when Portal came out, and even then mostly small indie stuff.)