Only tested Mars, but I noted something which may or may not be a concern.
You've stated in the readme that the goal is to make them play in a MVC style. Part of the traditional MVC styles is that the characters do less damage for single hits but are expected to do the traditional generic combo chains followed by specials/hypers to deal adequate damage. That being said, some of the combos and specials flow well. But linking any hypers to combos is difficult. Most of the standard hits will knock them too out of range giving them more than adequate time to block. I managed to work out a few with limited hits.
Again if this is intentional please disregard. Most people create characters in specific hybrid styles anyway and this may be yours. Otherwise, great work and thanks!
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