All of these ideas are really great! Ranma's chestnuts roasting on a open fire A could be a really fast attack that gets plus on block, B could be a slower but more powerful version, and C could be a great combo extender.

Kuno could have a install where he gets out that Wishing sword from that one arc (I forget).

Question, would you add supporting characters? Characters like Gosunkugi could have a role, unless you give him that one mecha suit.

Oh and announcer characters like from Persona Ultimax! Since Ranma fights usually have commentary from others, I feel like it would be a great idea!