In Fishing Superstars, the hidden Easter Egg Binbang is a very interesting boss collectible. To obtain this hidden Easter Egg Binbang, go to the shop on the third island and buy a 350-coin coconut as bait under the coconut tree. This will allow you to catch the high-damage and agile Binbang. After defeating it, you will receive the Binbang plushie.
How to Obtain the Hidden Easter Egg Binbang in Fishing Superstars