Observed recipe prompt
A field report and a September 5 video frame show the Fusion UI asking for three Insane chickens and displaying a Mega Egg result. That is enough to document the prompt, but not enough to publish a full recipe table.
Before you fuse
The source video is explicitly marked patched. Unlock conditions, eligible variants, cost, alternate outputs, and Mega Egg rewards need a live retest before this page should become a high-confidence Fusion guide.