Posted by Paleface on February 19, 2023 at 22:12:01 EST.
PC Engine Business! Found a seemingly unknown glitch or something in Double Dragon II: The Revenge on my PC Engine Duo-R: hammer on the I, II, and Run buttons all at once for a while in 1P Play mode, and the 2P character, Jimmy appears; the game acts like it is now in 2P Play B mode, except that both characters are controlled simultaneously using just the 1P controller.
I was NOT able to reproduce this emulating via Mednafen. Maybe it's a quirk of my repaired controller port? If you've got your own console and can try it out, lemme know what happens!
Video and a few more details inside.
Sometimes Jimmy appears within seconds of starting to mash the buttons, but other times it has taken 3-5 minutes of button pressing.
I was able to reproduce it using a standard Duo-R pad (as well as with a Hori Real Arcade Pro 5 PS4 (v2017) arcade stick through a Brook Super Converter).