All Eggs take 6 hours to hatch. And you can Skip it by using token.
Then hatch these eggs and greet the special new born baby Dino!.
After hatching, to join battles fighting Darkie Monsters and Borus - the Black leader monster, your Dinos need to evolve.
Dinos will need 9 days to become a mature Dino in order to Love, besides evolution and breeding stone conditions.