Be sure to prepare methods of curing paralysis and stone! Also, beware that using restorative magic will also cause the boss to use its own restorative magic, kupo!
Make sure to exploit the boss' physical weakness against lightning, and to boosst your party's earth resistancee before facing it in battle, kupo!
Do not drag the battle too long as the boss will start to use a strong attack called eggsecution on your team, eliminating your party members one by one, kupo!