If you mean I can't hit Undyne three times in a row I've made it several times, she also dodges very often, sometimes even twice in a row idk if it is a bug or anything else
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Yeah, I checked the code for those special rules, and there's actually a ">" instead of a ">=" in the part where it checks for the hits in a row, so right now you can hit her three times in a row in impossible mode and four in normal mode, thanks for making me notice this bug.
The part with the number of dodges seems right though, she can dodge only once in a row in impossible and twice in normal.