I wanna discuss Isaac again.
I'm starting to think he could add something called "move availability" to Project M. "What the hell are you talkin' bout, boy?" you might be asking. Well, in Golden Sun, there are these things called Djinni that, when used, unleash an ability of a sort. Isaac can have up to 7 of these, but we'll stick with Venus Djinni since that's basically earth magic, and only use 3. When a Djinni is used, it becomes a point toward summoning: after 1 Djinni is used, a weak summon is available to be called upon, and after 2 are used a stronger summon can come out, and it goes on. Essentially, a different move is available depending on how many Djinni-centered moves you got to connect with the opponent.
I came up with this as a good way to make Isaac unique beyond "attacks with an Earth theme." Summons like Ramses and Cybele could materialize using down-B after using some attacks that use Djinni. Like, say Flint is part of Isaac's forward smash (since the effect is basically "regular attack is stronger") while Ground and Bane are 2 of his specials. Summon could be his down special, so if he's performed all 3 Djinni-centered attacks successfully (preferably on-hit to make it fair), then his summon could be Cybele. But let's say you don't want Cybele and want Ramses, which only requires 2 Djinni attacks, or wanna save Bane for later--just use one of your Djinni-centered attacks again to "set" it again (as in it no longer counts toward "summon points"), it doesn't have to be on-hit either.
Unfortunately, I have no idea how this could work using the clone engine, but it was a fun exercise I just made for myself here and now so it entertained me at least
I'd be more than fine to have Isaac in the game even without the Djinni gimmick because earth mage w00t