“I know, Shy, I know” said a worried Bunny as she let Fluttershy cry out on her back. The mare was sobbing since the day Pinkie told Twilight she loved her. Bunny, however, knew something else: the love was not genuine; it was inflicted by a Love Poison.
It was the remains of the one the Cutie Mark Crusaders made, found by Pinkie Pie, and (thinking it was jam) baked it into cupcakes and passed them out to Rainbow Dash, Applejack, Rarity, Twilight, and Bunny. Bunny wasn’t affected by the spell because of her Love Immunity, but she was able to sense its effects on the others. Then, on the day Pinkie confessed her love to Twilight, her suspicions were confirmed. She also tried her best to ignore another feeling that there was something in Fluttershy. Since then, the alien started to look for a cure to save her friends, and she did.
After Fluttershy finally fell asleep, Bunny ran to secret room to undo the spell. On her desk was what she needed: the spell book, small jars of the tears of her affected friends, and a dove’s feather. She then started to chant:
“Pauca columba plenum remedium horum quatuor audito clamore et expediuntur”
As she chanted, the tears in the jars joined together as one, turned white, and were ready to use. She grabbed the Dove Feather, dipped it until it sucked up all the tears, blew on it, and let it become a live dove that flew off to the victims.
Her work done, and obviously tired from doing the spell, Bunny went to her bed and slept. The alien smirked; she knew her reverse spell will work. And it did.
The dove flew to Ponyville Square, turned to ashes, and the ashes went and cured her friends. It also helped them gain their lost memories under the Love Poison’s influence. In Twilight, she saw and felt something else. But it can’t have been a side effect from the Curing Spell, it only shows the cures, shows the truth, and opens up all lost memories.