You asked the question wrong. Who came first, the chicken or the egg has only one correct answer and that is, the egg. There were dinosaur eggs way before chickens existed. I believe you meant to ask Who came first, the chicken or the chicken egg.
Now as for the bonus question, if you meant who came to the forums first, it would be Raflesia. If you meant who was born first, then I would say Catastrophe.
$15 plz?