From Easter Donation Shop (Prontera 132 217), costs 500 Premium points for each pet:

• tamadora_egg
• metal_dragon_egg
• firefox_egg
• woodie_egg
• poriorc_egg
• poriwing_egg

From 2015_easter_event :

• Top Prizes Eggs
• (Now are available to be bought from Easter Donation Shop (Prontera 132 217), costs 500 Premium points for each pet)
  • elephant_egg
  • gorilla_egg
  • lion_egg
  • rhino_egg
  • amelit_egg
  • emelit_egg
  • sapphilit_egg
  • topalit_egg
  • mythlit_egg
  • brony_egg
• Eggs given each day:
  • spring_rabbit_egg
  • Lunatic Egg
  • Savage Babe Egg
  • garm_baby_egg
  • garden_keeper_egg
  • eclipse_egg
  • skoll_baby_egg
  • christmas_lunatic_egg
  • rudo_egg