This enemy is called “Bombster”. It appears only if you did a large damage to chicken groups and other enemy groups. Once it appears,it will chase you until it explodes. If there are chickens or other enemies you can make Bombsters bump into them and then explode. If there are alot of chickens and you use missiles…well,watch out. Because there can only be four on each wave and if you use a missile,two of them will spawn and then chase you. You can also destroy them with weapons,but it’s hard and also risky. Lighting Fryer and Utensil Poker can be effective on them. Thanks for reading this. I will hopefully update this. Have a nice day.