Crown shop Dropped from Poseidon Earth Shaker in Alanta And can be obtained in fishing chests (mostly found in the following areas. Cyclops lane, entrance hall, Murkolm Keep, Private Fishing retreat, The Grand chasm, The crystal Grove, Upper Zigazag)
Just be careful, they might've had a hatched one, in which case the talents of 1st gen could be totally different. Think about that before spending crowns