After months of searching, I have finally found my favorite Animorphs fan fiction about the children of the Animorphs fighting a renewed Yeerk invasion. Its called "Novamorphs". I apologize if this is the wrong place to post this link. (If so, where should I put it?).
https://www.fanfiction.net/s/5036060/1/Novamorphs-1-The-Infestation
