Lilith's not only brings out a monster's true form, but also the most prominent trait they keep buried; in short, the more repressed one is, the more they are affected. Both Mokas are very open with their feelings, so they don't get affected much. The rest of the girls are always heavily repressing their lust for Tsukune, so they go bonkers.
Ms Nekonome is hilariously affected by the mirror, showing she has to make a conscious effort to not behave like a base cat.
The school barrier is ridiculously fragile compared to the manga. A large amount of monster energy causing it to break so easily.
Kokoa's usual antics almost Doom everyone.
It's not explained how Kyoko got to Yokai Academy in this version.