A bit late to replying, but someone PM'd me to say there was a better version of Mighty available. (While also offering a patch to improve mine? Seemed redundant.) If that's true, I haven't seen it in Releases either, nor do I really look that far into this board. I've quit playing the game so much as casually for nearly two years now, and haven't had any reason to look around because of it. (Maybe 2.2 will change that.)
That said, if it's on here, I would also like Mighty trashed with the rest, in the future. If not, look around on a search engine and see if you can contact the creator. I'm more than open to active members of the community replacing my old stuff.
At the moment, this "replaced" Mighty is nothing more than users adding Lua scripts to your Mighty sprites. I know there are a few users interested in respriting Mighty, but as far as I know none of them are very far along, unless someone is doing him in secret. ¯\_(ツ)_/¯