An honestly incredible mod that functions well with just about any character that can go super. Upon multiplayer testing, it seems that only the server host is capable of entering Dark (and by proxy, Dark Super) and all other characters are locked out of achieving it (This was tested with Max Control Sonic and Adventure Sonic, with my friend, the host, playing as Adventure). Is this just a case of characters who have two transformations already (MCSonic has a Hyper form built-in) being unable to transform, or a lack of compatibility for the character themselves? If so, is there a way to modify the .lua to support them/possibly implement a way to modularly determine who can enter the form or not.
Other things I've noticed in multiplayer (that may or may not be unrelated):
1. Your frames will commit seppuku from Castle Eggman onwards when the script was active (was tested with a large pack of addons, could be completely unrelated)
2. Friendly-fire on other players is possible in netgames (I theorize it's because of how Unstoppable rewrites how damage works)
3. By the later stages in the vanilla campaign, the Dark form becomes extremely difficult to achieve and maintain with everyone running around (but this goes for just about every form, vanilla or otherwise)
Now, some other suggestions:
1. When at zero rings, you could have the ability to passively generate Negative Chaos Energy, which helps encourage the risky moves (like tackling enemies without taking a hit) required in order to activate the form
2. In addition to the first suggestion, Negative Chaos Energy is generated faster in boss fights depending on how many times you get hit (the rate could be decreased by 50% for every time you get hit)
That's about all I have for now on this awesome mod that *desperately* needs more attention. While experimental and a tad buggy, the Lua in its current state is incredibly fun, and could possibly lead to some new, crazier fanmade form mods from you in the future. I'd like to see more like this, so keep at it with my chaotic ramblings in mind.